Different Movie, Different Director?

While re-watching the series, I notice in 1 and 2 science and explanations were involved. It was all about the alternation, cloning, facts and reality. But number three wasn't directed by Steve Spielberg. I notice a lot of differences. Pros: It was scary, edge on your seat kinda thing, the plot was deep, you could connect, there was strong new characters, new threats (if they used T-rex again it may have become old?) and FINALLY the raptors had feathers!! Cons: No science or facts (meaning the dinosaurs lost some features, spinosaurous is a fish eater, Spinosaurous would have died once T-rex got his neck, no herbivores barely, etc) more blood or disgusting scenes (cruel bloody etc) more unnecasary scenes (which were scary)...I dont know guys tell me what you think...