I'd agree. It just is under populated in everyway. The zoo itself is beautiful and what it does display was thoroughly enjoyable, but when I went we comfortably walked all three walks in about an hour and a half, possibly less, and the Safari only takes 40minutes. Bought a coffee on arrival, and bought coffee and muffin to eat on the lawn at the end. Spent 20 minutes perusing the shop (I flick through the books and picture books out of habit). Comfortably filled a leasurely morning. MZ is a fraction of the size physically and yet really needs more than a day to see comfortably or an intense full day if rushing.
If WORZ maintains its African theming I think they should open a small African art gallery/cultural centre near the entrance. Could look at history of the continent, its people, and the diasapora.
I completely understand how fraught this can be as there are so many different cultures, but maybe they could look to what the largest migrant communities to Victoria are and put their main focus on those areas and cultural groups.