I like the Toledo Zoo a lot and I often recommend it to people with younger kids. Some years ago I was waiting in line to open up the Buffalo Zoo and a guy in line saw my Tiger cap and asked if I was from Detroit. He mentioned he'd been there the previous year and one thing he'd noticed was a lot of people with families bringing wagons, as the zoo is so big geographically. Toledo's is much smaller. It's a good zoo but not as much walking.
And yes, I chat with zoogoers in Detroit and some of them say they prefer the trip to Toledo, just more to see, and again, these are not people who think that you just jam in as many animals as you can.
I'm not opposed to some of the things Kagan has done. No animal needed to be removed, as far as I know, for the tiger exhibit expansion, and they've done a nice job with it. A zoo employee with whom I spoke last week said they're expecting a female fairly soon. I haven't heard anything about it otherwise.
But we had four bear species, now down to one. Several animals in the pits south of what I still call the Pavilion have been removed, and so forth Others above have listed more species dropped.
My situation as a zoogoer is not common. I live very close, I have no family, and I have a very flexible schedule so I can go over as I did last week, notice the lack of species (and some weren't out anyway) and I still enjoyed a pleasant walk around the zoo. As it happens all the indoor buildings were closed which was too bad in part because I'm trying to get more interested in amphibians.
But if I were a family that had a schedule, and getting to the zoo was not something I could do casually and at the drop of a hat, I would find such visits often disappointing.