Jurassic World lost some of my interest as soon as the kids were cast. There was nothing wrong with the performances, its just a concept that's been done already and worked brilliantly in Jurassic Park because of the dynamic the two children had with Sam Neill's character. For me its a shame that the best they could come up with was another "kids lost in the park" subplot.
I enjoyed the film itself, it wasn't great but a solid enough addition to the franchise. The characters on the whole were quite bland though, Jurassic Park had characters like Muldoon and Gennaro who might not have had the most screen time but were still clearly defined and added something. With Jurassic World it felt like they were checking off stereotypes derived from the first film; awkward control room analyst, naive but well-meaning billionaire entrepreneur, siblings with divorcing parents, head of security who under-estimates the dinosaurs to his cost, etc. At times it just felt too much like a homage to the first film than an attempt to further the story further.
The direction in which the story is heading seems obvious but its not one that appeals to me so while I enjoyed Jurassic World, I'm not particularly enthusiastic about what I think is coming in the next installment in the franchise.