For me it's one of the most logical forward-thinking concepts they could have went with. It takes elements mentioned in the novel that wasn't really touched on in the first movie and used that as a concept for this. As the second and third movie showed, just throwing people into the remnants of the island for another gotta get the fuck out of here sequel just doesn't work, or is at least not interesting at all. I sure as hell didn't want something like that again. Even if you don't enjoy this concept, it's more promising to me than that, and I'm not really sure whatever else they could do would be so much better.
So the first movie was about how Hammond dreamed big, but his execution was clumsy. The poisonous plants, the lack of locks on the jeeps, hiring Nedry because he's good likely without giving him a proper interview, etc. The park in the original was full of missteps. The idea here is that Jurassic World is supposed to be more elite and conceptualized than the first park. Bigger, safer... even Hammond mentioned that eventually there would be rides and this and that, implying that he would keep going further with his park. That's what I see this movie as, as it poses the question, what would happen if Jurassic Park were a success?
And it is, until their ideas become a bit too much, and with Indominus they're right back to making Hammond mistakes. Obviously they had their shit together with the rest of the park and attractions, but now this hesitance and uncertainty gets the better of them. They even ask Pratt to come in and check Indominus' paddock for vulnerabilities. The movie is pretty much about how far they can go until the ceiling collapses.
