Not sure why the discussion seems to be thrills vs theming here, I think both can coexist quite well.
For people who seem lost on why people are let down by this new ride: it's not the ride itself. It's the fact that it's the last hurrah for the Jurassic section of the park, and people wanted something next level from that universe in terms of innovation, theming, and authenticity. They want a real Jurassic Park/World experience, that can wow whether you're on a ride, or taking in the scenery in a magical way only parks like Universal and Disney can deliver.
This ride is probably going to be a lot of fun, but it's not the overall themed 'experience' and world deep dive people have come to love from these parks. If Jurassic wasn't stuck between Kong and Potter with no expansion room, and no plans for Fantastic Worlds, I think people would be a lot more excited.
Jurassic Park is an incredible film, with a huge world built with each successful sequel - plus.... DINOSAURS. It's Universals largest franchise, so it's just a bit odd seeing it get a more 'simple' approach to expansion.
but hey - who knows - maybe this isn't the end for Jurassic at the parks stateside - I know insiders have said it basically is (minus a River Adventure redux with some World retheming to come), but maybe there are larger plans at play, and everyone will be happy.
All I'm saying, is this ride could provide more than just fast coaster thrills - it could be a star attraction with some clever eye catching theming, at least on a superficial level (think Everest).