I'm not a huge fan of the made-up creatures in JP but if you're gonna have mutants and hybrids, they should do something that no regular dinosaur could do. The Indominus Rex being a gigantic theropod with cloaking, intelligence, bloodlust and invisibility to thermal imaging is crazy but it at least serves a narrative purpose of causing the destruction of a park that had already learned from the original park's mistakes. The Indoraptor in-universe is marketed as a more portable and weaponized version of the Indominus Rex which isn't the worst idea ever on paper. I don't want to talk about the bugs. The D-Rex basically does one thing that's sort of cool, if not obviously ridiculous, and then nothing else but be ugly.
At least they quickly wrote out the farcical status quo with dinosaurs freely roaming the entire world.