Yeah, I would love to see the hippos get a better exhibit, along with new hippos for breeding, but that isn't for another, like TZFan said, 15+ years.
I find the biggest challenge the zoo faces, ais making exhibits for the winter months when the animal needs to be indoors. A good chunk of our animals just aren't view-able during he winter.
Warthogs/Red River Hogs (sometimes alternate on exhibit indoors, although it's usually the Red River Hogs), Hippos, Kudu and birds in Kudu exhibit, White Rhinos, Zebra, Olive Baboons (depending on temperature), Ostriches, Wildebeest, Sable antelopes, African Porcupine and Watusi are all off exhibit. Penguins are pretty much off exhibit, as I find that indoor viewing seemingly pointless on the colder days. The glass is usually covered in condensation. And that doesn't included the animals only seen on the Zoomobile. After thanksgiving, you have to wait until mid may to see them again.
I feel like the zoo has a lot of wasted space that they can us to build good, sizable indoor facilities that would allow the public to see some of these animals during the winter, but again, it all comes down to money, which they don't have.