Sea otters and/or river otters
Aviaries, small and large
Small mammal exhibits
Fossa
Moose
Beaver
Koala bear
Kangaroo
Sea lions
Meerkats
A walkthrough rainforest garden/house
Kid's tunnel into habitats with viewing bubbles
Actual walk-in restaurants
Actual walk-in gift shops
Keeper showcases, maybe even little theaters with seating for lectures/demonstrations
Keeper ability to bathe animals
Telescopes
Playgrounds
Splash pads
Drinking fountains (a cheap way to appease thirsty guests, particularly on a long path)
New employee -- Mascots to walk around and entertain guests
Petting zoo
Carts for employees to get to places faster, something like in Jurassic World Evolution (but simple); or even for just very large open habitats
Aviaries, small and large
Small mammal exhibits
Fossa
Moose
Beaver
Koala bear
Kangaroo
Sea lions
Meerkats
A walkthrough rainforest garden/house
Kid's tunnel into habitats with viewing bubbles
Actual walk-in restaurants
Actual walk-in gift shops
Keeper showcases, maybe even little theaters with seating for lectures/demonstrations
Keeper ability to bathe animals
Telescopes
Playgrounds
Splash pads
Drinking fountains (a cheap way to appease thirsty guests, particularly on a long path)
New employee -- Mascots to walk around and entertain guests
Petting zoo
Carts for employees to get to places faster, something like in Jurassic World Evolution (but simple); or even for just very large open habitats