Here is an article about the Kansas City Zoos' new viewing decks and indoor lion viewing area.
Maybe this will be a good answer for this very good zoo! I honestly think KC's Africa exhibit area is one of the best zoo exhibits in America. They have the nation's best chimpanzee exhibit, one of the best for elephants, an excellent lion exhibit, probably the most complete collection of African animals in the USA, and all of it displayed among great cultural African buildings that are quite convincing in giving a "you-are-there" atmosphere. Despite all of this excellence, they've continued to struggle attendance-wise. Some of the things I've read is that the exhibit is "too large" or "too hot" (in the summer). So perhaps little modifications like these covered viewing decks will really help.