I visited today with some friends and we all had an excellent time. It was busier than expected though so a lot of my impressions were quick.
Amazon Rising is still a stand-out and the renovations have only improved the exhibit, mostly affecting the second hall of it. The new enclosures for electric eel and anaconda are really well done with some much improved signage. They did feel a little step above the older enclosures in quality. I definitely found the eels much more interesting in this setup than the older one and it's great the anaconda has more room to itself. The new arapaima habitat is fantastic and a real showstopper, although the giant fish were visible but not showy today, but it let the Giant Amazon river turtles star in the meantime. In regards to birds, I saw Hawk-headed parrots, Brazilian teal, Ruddy duck and Wattled jacana, the latter three in the same enclosure. All brilliant species in my opinion. It doesn't feel like anything has been lost in the changes, and I'm sure someone could find out something was, but I've not figured it out. I really feel like every time I visit the aquarium, I love this exhibit more.
I have obviously been critical here with Wonder of Water and sort of stand by my criticism -- my friends, who are not zoo nerds, agreed on missing the old reef exhibit's architecture at least. That said, I will echo
@TurningOfTheWheel and @paychyderm pro that it is indeed far more impressive in person than it looks in photography or concept art. They are very well constructed and very full of fish and it's really cool to stand between them. I do take back my concern the live coral wouldn't be as stunning as it is on display and the freshwater tank is better than expected. I will make one fresh criticism, which is that the total lack of signage here is a colossal disappointment. There's plenty of empty space around the exhibit where signage could be installed. All that aside, I really do think it will grow on me over time, especially if I visit with smaller crowds later this year.
The new entrance is decent, fine. The new 'ticketing experience' felt a little flat for us and not special or smooth, the new gift shop seemed like a big improvement though. It does feel pretty open and that does help with traffic of course. Part of me feels like it's missing something but I couldn't figure what.
The Oceanarium and Wild Reef remain delightful highlights. I managed my first viewing of the Bowmouth guitarfish at the former, and a surprisingly clear sight on the Wobbegong as well. Felt like some of the groupers left? Also got to see some schooling behavior. It really is Shedd's answer to the many Open Ocean galleries. We also saw the Belugas feeding and active underwater and caught my first local dolphin presentation in years and while it was short it was more impressive than Indianapolis' presentation. Glad tail-walking is still in vogue. Not much luck viewing dolphins underwater. I wonder if they'll ever give the Sea Lion habitat glass or something instead of netting? It photographs so poorly.
The loss of Islands and Lakes, Rivers and Streams, the Reptiles section and the former Seahorses section did sting a bit though. For me personally, "Rivers and Streams" had some of my favorite freshwater enclosures and species in the facility including the fly river turtle, the paddlefish, the lungfish, the cichlids and so forth. I wonder if the turtle will return in the upcoming changes? I know the paddlefish and lungfish are mentioned. I do find it surprising that the decision appears to be to transform the Rivers/Islands and Lakes galleries into "Changing Oceans" and the Oceans/Great Lakes gelleries into the new "River Wonders" and "Living Lakes" galleries. I expected them to take up the equivalent spaces of the older exhibits.