We need more life in savanna biomes. My personal favorite are the Spotted Hyenas, pet, avoids Lions. We could use Zebras, mount similar to horses after all would be easy as we already have horses. Elephants, giraffes, I'm surprised Lions haven't been added yet. Most would be good ambient mobs as we only have bats in that category. If they went as far as to add anew category, we might as well keep adding to it.