Your main contributions to this site are complaining about what exhibits you don't like. What savanna exhibits do you like and what is wrong with this exhibit?
It's super bare uninteresting and nonimmersive. My favorite savanna exhibits I have seen are Dallas, Bronx, DAK, Busch Gardens, North Carolina, Jacksonville(the giraffe and rhino exhibits especially), Brookfield and San Diego Safari Park. While I haven't seen them in person Omaha, Kansas City, Columbus, Woodland Park, Honolulu, Phoenix and San Francisco are all top-notch and immersive.