I like this!
The African area plans are pretty solid and almost certain to happen. The zoo has awarded about $150,000 (IIRC) for the design contract already. I agree that the zoo would be better to keep wild ass instead of zebras. According to a county document, the rhino spaces need to be big enough for "at least two individuals", and the giraffe spaces need to be able to "accommodate potential breeding". Meerkats are mentioned as a possible small animal for one of the exhibits in the new African area.
As for cats - the zoo's next major project after the African exhibits will be cat-focused. The plans for it do mention snow and clouded leopards and/or "other small cat species". This development wouldn't be for several more years so it will likely be subject to a lot of change.
If you're interested, I can send you some documents about the zoo's renovation plans.
I'd love to see them!