No offense, but that's nonsense. First of all, the average visitor wants to see animals. If the "wrapping" has some kind of "geozoo" theme going, then this might be appretiated, but not be overly fussed about. As various examples in zoos illustrate, exhibits following a certain theme (for example "rainforest", "desert", "islands" etc.) with a wild mix of all sort of creatures are equally popular.
So after bashing the deer, the zebras are next? Having several species of one genus or family in one zoo has the educational effect of enabling the visitor to compare the different species.
And as we talk about "geography": the area the oh so scolded mountain animal exhibits were built upon was already hilly to start from. Building an "African Savannah" there would not have been in line with the existing topography. Personally, I prefer that zoos design and build their exhibits in accordance with the setting of the zoo, and not in accordance to some drab standard settings.
Isn't the mountain animal area the most "zoogeographical" part of the Tierpark, anyway? There you go...