Here's mine, because why not:
Tropic World
Honestly, this exhibit isn't that bad. It suffers from a lack of natural, well, anything, but has lots of climbing space and the enclosures are very large. I would add natural substrate (soil or maybe mulch) to much of the floor and replace the fake plants with real ones. I would repaint the fake tree and the backdrops of all the main habitats (giant murals, anyone?). The habitats seem a bit empty currently. For South America, I would add Capybara, Black Howler Monkeys, Brown Capuchins, Amazonian Motmots, and Spangled Cotingas to the main habitat. Up near the path, turn the sloth area into one for for a South American Coati and Screaming Hairy Armadillo. In Asia, I would add add large trees to allow the orangs access to the lower parts of the enclosure (there's no reason for them to be separate). As for Asian birds, I would add Red-whiskered Bulbul, Azure-winged Magpie, Chinese Hwamei, Golden-headed Myna, and Pied Imperial-Pigeon. Up near the visitor path, I think there should be a couple exhibits added: one for Tokay Gecko and one for Common Tree Shrew. In Africa, Mandrill, Emerald Starling, Blue Duiker, and the magabeys currently in the "ape retirement home" would be added to the main exhibit. The "ape retirement home" would become home to either the lemurs from the play zoo, a Fossa, or a Great Blue Turaco.
Outside the building, on the site of the current "Aqua Trail", an outdoor exhibit for the gorillas would be constructed.
Habitat Africa! The Savanna and Hoofstock Yards
Habitat Africa! The Savanna is actually close to perfect, the only problem is the recurring hoofstock species. I think the former African waterhole turned boring Addax yard could become a swampy exhibit for Sitatunga or Red Lechwe. An alternative to this would be a swampy netted aviary for Shoebill, White Stork, Egyptian Goose, and Blue Crane. I would move some of the traditional savanna species currently missing (Common Waterbuck, kudu, Common Ostrich, Impala, Bontebok) into the current Bactrian Camel and Prewalski's Horse yard, and official making the current hoofstock yards into part of Habitat Africa. Where the old Aardvark exhibit was add en exhibit for Small-spotted Genet.
Habitat Africa! The Forest
This part, like the other Habitat Africa, almost perfect, it's just the recurring species that are the issue. I would turn one of the Yellow-backed Duiker yards to a a mixed species with Red River Hog. The remaining Yellow-backed Duiker yard could be for Bongo and Black Duiker. The old Red River Hog yard could become a Congo aviary with species like Hadada Ibis, Snowy-crowned Robin-Chat, Common Bulbul, Congo Peafowl, White-cheeked Turaco, and Green Wood-Hoopoe. Inside the building, I would turn the current Madagascar terrarium into one for Togo Slippery Frogs.
Australia
The size of westernmost Macropod/Emu yard is really unnecessary. I would cut the size in half and in the remaining area add exhibits for Koala, Brush-tailed Bettong, and Tasmanian Devil. Inside I would bring back all the estrelids to their old home and bring in Blue-winged Kookaburra to replace the Laughing.
Great Bear Wilderness
Add a couple of netted aviaries near the wolves, one for the ravens from the play zoo and the other for the kestrel (also from the play zoo). Inside the building with the bear underwater viewing, add some terrariums for species like Wood Frog and other interesting North American herps.
The Living Coast
Change around the inhabitants of a few of the tanks and terrariums to better fit with the Chilean coast theme. Turn the current splash pad and trees behind them into an exhibit for Cougar.
Feathers and Scales and the Formal Pool
I would make this house much more bird oriented by removing all the "scales". I would add a major expansion to the building by expanding it over the Formal Pool. I would keep the current Rainforest and Desert Aviaries, with the Rainforest one expanded to cover most of the building's current footprint. The rest of the building (the new areas) would be a bird house akin to Toledo's. I would add species to both of the aviaries kept from the original building and add plenty of new ones into the expansion. This would be a huge bird house with lots of species, including rarities.
Reptiles and Birds and the Hamill Family Nature Plaza
This house, of course, would become a reptile house. I would expand it to cover the Hamill Family Nature Plaza and have a new, huge, reptile house with multiple floors. All the species moved out of terrariums in other places around the zoo would reside here, as well as other species brought in. If the zoo wanted to do something really interesting, they could open the house with a large amount of empty terrariums and slowly fill them with illegally smuggled animals that were found at the O'Hare Airport (this actually happens all the time, unfortunately. Much of the zoo's reptile collection came this way). This would be a great opportunity to educate the public about the illegal pet trade.
The Swamp
No changes.
Butterflies
Remove the extra charge and turn this into a small invertebrate house.
Hamill Family Play Zoo and Wild Encounters
Honestly, I don't want many changes here. These bring in quite a lot of money for the zoo. They don't really have many species interesting for ZooChatters but that's okay - it means we don't have to pay extra. All the species I want put in other parts of the zoo rather than the play zoo I have put in other parts of this post. I think the only thing I would add is a butterfly house because the other one would be gone.
Old Bear Grottoes
Put a building here and make it a small aquarium for native species (such as the ones moved out of The Living Coast). There could be a section on aquatic invasive species, as well. This would a great opportunity to educate the public about Asian Carp and Zebra Mussels, as well a breeding space for more endangered native species like freshwater mussels and American Paddlefish.
Seven Seas and Pinniped Point
Bring Walrus back in to Pinniped Point. Keep the dolphins but put them on phase-out, bring in Florida Manatees later. Rechristen the area Marine Mammal Rescue Center or something like that. When the manatees come in, add fish and sea turtles to the pool. The area above the water (current dolphin show theater) could become a mangrove aviary with waterbirds and sloths.
Big Cats
Keep as is.
Fragile Desert/Rainforest
The rainforest is fine as is. Add more terrariums for reptiles and arthropods into the desert, otherwise the current expansion plan is fine, as long as they keep Black-footed Cat.
Pachyderm Building
Keep as is.
The number one most important thing the zoo needs is to redo all the landscaping with native plants and have sign all around the zoo about why this is important.
Tropic World
Honestly, this exhibit isn't that bad. It suffers from a lack of natural, well, anything, but has lots of climbing space and the enclosures are very large. I would add natural substrate (soil or maybe mulch) to much of the floor and replace the fake plants with real ones. I would repaint the fake tree and the backdrops of all the main habitats (giant murals, anyone?). The habitats seem a bit empty currently. For South America, I would add Capybara, Black Howler Monkeys, Brown Capuchins, Amazonian Motmots, and Spangled Cotingas to the main habitat. Up near the path, turn the sloth area into one for for a South American Coati and Screaming Hairy Armadillo. In Asia, I would add add large trees to allow the orangs access to the lower parts of the enclosure (there's no reason for them to be separate). As for Asian birds, I would add Red-whiskered Bulbul, Azure-winged Magpie, Chinese Hwamei, Golden-headed Myna, and Pied Imperial-Pigeon. Up near the visitor path, I think there should be a couple exhibits added: one for Tokay Gecko and one for Common Tree Shrew. In Africa, Mandrill, Emerald Starling, Blue Duiker, and the magabeys currently in the "ape retirement home" would be added to the main exhibit. The "ape retirement home" would become home to either the lemurs from the play zoo, a Fossa, or a Great Blue Turaco.
Outside the building, on the site of the current "Aqua Trail", an outdoor exhibit for the gorillas would be constructed.
Habitat Africa! The Savanna and Hoofstock Yards
Habitat Africa! The Savanna is actually close to perfect, the only problem is the recurring hoofstock species. I think the former African waterhole turned boring Addax yard could become a swampy exhibit for Sitatunga or Red Lechwe. An alternative to this would be a swampy netted aviary for Shoebill, White Stork, Egyptian Goose, and Blue Crane. I would move some of the traditional savanna species currently missing (Common Waterbuck, kudu, Common Ostrich, Impala, Bontebok) into the current Bactrian Camel and Prewalski's Horse yard, and official making the current hoofstock yards into part of Habitat Africa. Where the old Aardvark exhibit was add en exhibit for Small-spotted Genet.
Habitat Africa! The Forest
This part, like the other Habitat Africa, almost perfect, it's just the recurring species that are the issue. I would turn one of the Yellow-backed Duiker yards to a a mixed species with Red River Hog. The remaining Yellow-backed Duiker yard could be for Bongo and Black Duiker. The old Red River Hog yard could become a Congo aviary with species like Hadada Ibis, Snowy-crowned Robin-Chat, Common Bulbul, Congo Peafowl, White-cheeked Turaco, and Green Wood-Hoopoe. Inside the building, I would turn the current Madagascar terrarium into one for Togo Slippery Frogs.
Australia
The size of westernmost Macropod/Emu yard is really unnecessary. I would cut the size in half and in the remaining area add exhibits for Koala, Brush-tailed Bettong, and Tasmanian Devil. Inside I would bring back all the estrelids to their old home and bring in Blue-winged Kookaburra to replace the Laughing.
Great Bear Wilderness
Add a couple of netted aviaries near the wolves, one for the ravens from the play zoo and the other for the kestrel (also from the play zoo). Inside the building with the bear underwater viewing, add some terrariums for species like Wood Frog and other interesting North American herps.
The Living Coast
Change around the inhabitants of a few of the tanks and terrariums to better fit with the Chilean coast theme. Turn the current splash pad and trees behind them into an exhibit for Cougar.
Feathers and Scales and the Formal Pool
I would make this house much more bird oriented by removing all the "scales". I would add a major expansion to the building by expanding it over the Formal Pool. I would keep the current Rainforest and Desert Aviaries, with the Rainforest one expanded to cover most of the building's current footprint. The rest of the building (the new areas) would be a bird house akin to Toledo's. I would add species to both of the aviaries kept from the original building and add plenty of new ones into the expansion. This would be a huge bird house with lots of species, including rarities.
Reptiles and Birds and the Hamill Family Nature Plaza
This house, of course, would become a reptile house. I would expand it to cover the Hamill Family Nature Plaza and have a new, huge, reptile house with multiple floors. All the species moved out of terrariums in other places around the zoo would reside here, as well as other species brought in. If the zoo wanted to do something really interesting, they could open the house with a large amount of empty terrariums and slowly fill them with illegally smuggled animals that were found at the O'Hare Airport (this actually happens all the time, unfortunately. Much of the zoo's reptile collection came this way). This would be a great opportunity to educate the public about the illegal pet trade.
The Swamp
No changes.
Butterflies
Remove the extra charge and turn this into a small invertebrate house.
Hamill Family Play Zoo and Wild Encounters
Honestly, I don't want many changes here. These bring in quite a lot of money for the zoo. They don't really have many species interesting for ZooChatters but that's okay - it means we don't have to pay extra. All the species I want put in other parts of the zoo rather than the play zoo I have put in other parts of this post. I think the only thing I would add is a butterfly house because the other one would be gone.
Old Bear Grottoes
Put a building here and make it a small aquarium for native species (such as the ones moved out of The Living Coast). There could be a section on aquatic invasive species, as well. This would a great opportunity to educate the public about Asian Carp and Zebra Mussels, as well a breeding space for more endangered native species like freshwater mussels and American Paddlefish.
Seven Seas and Pinniped Point
Bring Walrus back in to Pinniped Point. Keep the dolphins but put them on phase-out, bring in Florida Manatees later. Rechristen the area Marine Mammal Rescue Center or something like that. When the manatees come in, add fish and sea turtles to the pool. The area above the water (current dolphin show theater) could become a mangrove aviary with waterbirds and sloths.
Big Cats
Keep as is.
Fragile Desert/Rainforest
The rainforest is fine as is. Add more terrariums for reptiles and arthropods into the desert, otherwise the current expansion plan is fine, as long as they keep Black-footed Cat.
Pachyderm Building
Keep as is.
The number one most important thing the zoo needs is to redo all the landscaping with native plants and have sign all around the zoo about why this is important.