I understand everyone's frustration, but I think some of these complaints aren't being very fair to the zoos circumstances.
Right now the zoo is experiencing the natural growing pains associated with significant change and development. Keep in mind that Milwaukee has a lot of catching up to do after two decades of minimal changes and no major additions. Until construction begins on the last Adventure Africa phase, the entire central part of the zoo (mainly what remains of the pachyderm mall) is going to be a bit messy for a while. I give the zoo credit for filling the space with temporary additions like yaks and tortoises instead of just leaving them empty to at least show that they are doing there best to keep things active. It's not like they are removing species and leaving exhibits empty with no future plans, they are actively pursuing a very promising looking development to take over the space with the rhino and hippo house. These things take time, but it's also important to remember that we are coming off of three major projects opening in back-to-back-to-back years: Otter Passage and the West Entrance in 2018, the elephant complex and antelope paddocks in 2019, and the hippo exhibit in 2020. Even though we all have some mixed opinions about how some of these exhibits turned out, they were all multi-million dollar endeavors that were delayed countless times in the past before things finally aligned and it should be commended that the zoo was able to constantly open a major exhibit three years in a row. This year is also the calm before the storm of construction that is on the horizon. Next year three more major capital projects are on track to start development: The new rhino/hippo house, the penguin expansion, and the revamped main entrance. Until then it's to be expected that things are going to be quiet this year while the zoo is preparing for the surge in development to come in 2023. Don't let the empty exhibits fool you, Milwaukee is the most progressive now than it's ever been.
With all of that said, I do agree that things are far from perfect.
This is all very true. Milwaukee is a very rough around the edges at the moment. The signage and railings are very dated and in dire need of being replaced. Again, this is something that will be fixed all at once as these areas are replaced entirely in the future. A lack of proper upkeep is a pattern I will admit is an issue though, as the crumbling pathways and rusted fencing are not a good look and give a very dated vibe to the grounds. The ape yards have also been blocked off since before covid which is really quite ridiculous at this point.
The status of the Alaskas Cold Coast project is unknown at this point, but by all means a new North American zone replacing the current one is definitely the next big thing post Adventure Africa. Mr. Morris alluded to plans for exhibits focusing on cold tolerant species and while plans will have changed from the old master plan, the same general idea of an Alaskan exhibit taking up the entirety of the North American exhibits is still a go. In fact from what I hear moose, elk and wolves may be folded into the plans from the since scrapped Wild Woods exhibit. I agree that it would be nice for prairie dogs to be back, but the former polar bear enclosure is a concrete dumpster fire not suited for any species and it should stay empty until its demolished.
Now this I concur is inexcusable. It's one thing to have commentary on ocean pollution, but to just fill is an exhibit with garbage with no explanation is foolish. Looks like there taking notes from the Beaver Springs Aquarium. Side Note: You never want to emulate the Beaver Springs Aquarium, for anything.
There were plans to bring in a male bongo from San Fransisco before covid hit, but any mention of those plans has been ceased and I have no idea why. I agree that the zoo is missing a big opportunity by not following through with this.
No he's there, you just never, ever see him.
Speak for yourself, I think Watusi are cool.

I doubt that will be happening though, as the reason the yaks were brought it is because they can be exhibited during the winter. I'm not sure how cold tolerant Watusi are, but Wisconsin winters are no joke and I don't think they would bring in a species to exhibit them outdoors for five months tops before locking them indoors for another four months before demolishing the whole area.