Something missing from JP as well is some Dino vs Dino action - JP did it with the Rex vs Raptors, JP3 poorly explored the idea, and Jurassic World is going to play with it a ton. It would be neat to see what they can do it. Perhaps once things go wrong in the ride, or maybe it could be what causes things to go wrong.
Also, the Indominus Rex is just begging to be included in the park somehow.