I may edit this post if anything else comes to my mind;
My features wishlist is:
- Aviaries, I would prefer to build my own aviaries, but I wouldn't mind pre-built ones if it's the only way we can get flying animals, with multiple selections of the kind of aviary you want; eg "net aviary", "cubic caged aviary", "tall caged aviary" and so on.
- Aquariums, same thing as aviaries, would be cool to also have small aquariums where you can mix small aquatic fauna.
- Customizable exhibit sizes, this is one of the most requested features, some animals are too small for the exhibits we have and some are too big to be realistically comfortable, it would also be cool to have some considerably bigger ones to be able to put in some animals that are currently placeable in habitats like the Nile Monitor and Cuvier's Dwarf Caiman; reptiles are know to be lazy and slow if they're relaxed, and they wouldn't need that much of a space, would be nice to also be able to put iguanas out of the exhibits.
- Variations in cheratine structures: basically every horn, tusk, tooth, shell, beak, antler and claw should be subject to changes, like being broken, shattered, longer, shorter, bigger, smaller, different basically, maybe not in every animal, but it would look cool if your favorite elephant is a "Tusker", an elephant with extraordinary long tusks, and would also give them more personality.
- Animal personalities: every animal as for now basically feels the same, a moving prop, but adding personalities would drastically improve the gameplay: some examples of personalities could be shy, intrepid, social, brave, curios, territorial, submissive and each one would have its own perks, for example a curious animal will spend more time looking for food enrichments, a playful animal will spend more time with toys enrichments, a territorial animal will dispute multiple times with other of its species to mantain its status.
- Realistic mode/settings: you like your zoo, but it doesn't feel like a real one? Realistic mode is here for you: it could contain some rather mature content, like a mother dying during birth, or a cub dying during birth, or even both; this mode is aimed for a Realistic experience for a more mature fanbase, it should be limited to 16+ yo players as some people may find it "disturbing"; but catastrophes aren't the only things happening in this game mode, things like private donators, police/rangers contacting you regarding the custody of a confiscated animal, periods of economic crisis and many more challenges and options.