Finally saw this film (it's the last day my theater's playing it). I enjoyed it, with the caveat that Fallen Kingdom cratered my expectations. While I prefer the Park trilogy to the World trio, I do like that the latter feel more like an actual progression of the universe; 'we created a monster to get attention' and 'we made a plague to ensure people buy our product' is more interesting than finding a contrived way to get back to the island a third time. That being said, it felt like it dragged on quite a bit and I started idly thinking how odd it was that the kids show got to the dino carnage before this film did.
I love the, I guess dinosaur fan-service here. The Therizinosaur, feathered raptor, Dilophosaur's return, and Giganotosaurus were all creatures I had always hoped to see in one these movies (even if the Giga feels reeeaaally late now). The Quetzalcoatlus and Dimetrodon were fun to see too. What a nice way to end this series!
The cast of the two trilogies coming together was pretty fun. A lot of the callbacks were rather silly (somehow the barbasol can returned), although I did like the twist on Ian Malcolm distracting a therapod with a flare. It does bring to light how different Park and World are, though; Alan Grant 'communicated' with the raptors in JP3 with specific calls and body posture and feels like someone studied actual pack animal behavior, but here he has to follow Owen Grady's method of giving the "stop" gesture which doesn't actually make the dinos stop.
Surprised they kept the laser tracker thing from Fallen Kingdom, given how much flak that got.
The final therapod fight was kinda insane in how disconected it was from everything. The Theriz and Giga weren't major villain types, the Rex is there just because it's an icon, and our heroes simply walk right past it. It's too bad they deleted that prologue they released as a teaser, it'd at least give some throughline for the Rex and Giga fighting.