The option to create hatchlings in the creation lab. Wether they get accepted into herd/pack should depend on species. For example herbivores more likely to accept them while medium/large theropods only tolerate them at a certain distance, or not at all. Cannibals view them as food.
Herbivores should respond to threats differently depending on species. While para, tsintao, or edmontasaurus run, trike should group together facing the threat. Stegosaurs could try to surround threat and attack from different angles
Better terrain tools. The option to build deeper water for dinos such as baryonyx and spino. Be able to place grass, bushes, fern and trees individually or all at one time with brush. There should be terrain options such at sand, dirt, grass or even mud
There should be under ground power lines with a 10-20% increase in chance of main station being hit by lightning and tornadoes. Thunder storms can cause flooding in underground system that leads to power outages
Dinos should interact with guests in gyrosphere. There should be cosmetic upgrades that alter dinos model, head crests, quills etc
Next time I eat some chicken ima snap the wish bone n hope for some breeding mechanic in game at some point down the road