Man, fans are a fickle bunch to please. I don't like every change with the updated version, for sure.
But I think it's important to point out in the version of the ride story: T-Rex Kingdom is always our intended destination. There is nothing "accidental" about us going over the waterfall. That is a Jurassic Park (1996) story beat. In the original version of the ride, we are knocked off course and into a maintenance-type building we're not supposed to be in. If anything, us "accidentally" going over a waterfall applies more to the original attraction than it does to JW and frankly, raises some questions about why the maintenance building in the original incarnation happened to have a boat ride path through it and waterfall that just happens to perfectly lead us to the unload area.
In JW, the final show building is an intended exhibit. We see it on the map to our left just before we enter the Mosasaurus aquarium. We're always meant to go over it. It's part of the "JW ride" we're getting on and not part of a serious of unfortunate events. -and using basic understanding of Zoos, we wouldn't have been in any mortal danger seeing the Rex in here, normally. Lots of Zoos use hidden techniques to keep animals away from certain areas so we just have to go with the flow that had it not been for the power/containment failure, our trip through T-Rex Kingdom would have been awesome but otherwise non-life threatening.
I'm also not entirely sure I follow the criticism of us being "less involved" than before. This is especially frustrating to hear because for some folks and some attractions, they want us to be "less involved" to begin with. Some folks cite rides like Pirates as perfect examples of us simply bearing witness to events on attractions while saying stuff like Rise of the Resistance tries too hard to involve us in it's storyline.
Folks are never going to be totally happy. You can't please everyone. But, like, c'mon, let's look at things critically here:
In both JP and JW, the basic premise of the attraction is virtually identical. We are guests of JP/JW and we're boarding a boat ride in JP/JW to see dinosaurs (duh). We're "meant" to be observers while we're spoken to by pre-recorded spiels explaining the habitats we're visiting.
Both rides have this basic premise. Let's look at the dinosaurs who actively "interact" or "attack" us in JP:
Ultrasaur Lagoon: none, we're bystanders
Stegosaur Springs: none, we're bystanders
Hadosaur Cove: 1 Parasaurolophus who knocks us off course
Raptor Containment Area: 2 Dilophosaurus who attack us just before the final lift
Maintenance Area: 2 Raptors on the lift (when working), 1 Rex head and the final Rex attack
JW has nearly an identical amount: Mosasaurus tries to charge us in the aquarium, Parasaruolophus no longer accidentally "attacks" us but (as the narration explains), interacts by "playing" with us in the water near our boat, one Raptor remains on the lift, the 2 Dilophosaurus' attack us in T-Rex Kingdom, we're attempted to be attacked by the Indominus twice, once where the old Rex head was and once more for the final figure before Rexy comes out to distract. At worst we are -1 Raptor in terms of interaction but still have the Rex figure which, during some cycles, does aim for Guests as the boat drops.
When the cycles are timed correctly, I think the new finale works very well. Our attention is on the Indominus as it is about to attack us, we're not even focused on the waterfall. It's staging was really one of the only choices they had to hide whatever system keeps it running from Guests and gets it suitably close to the riders. It's also important to note that the Indominus is an invader. It doesn't care about staging or where things are "supposed to be" to feel more natural. It goes wherever it wants, when it wants to because it doesn't even know what it is. It is, by it's very existence, unsettling and un-natural.
Then, the Rex emerges suddenly and confronts the Indominus. If you watch them, as we're intended to do, they are very obviously entering a confrontation and get close enough to make it believable (when things are on the correct timing for boat cycles). But before they get too close, suddenly we're already on our way down the drop and we're left with our imagination to fill in what's likely happening just after we barely escaped.
I think that's fine. They weren't about to be able to get two giant figures to collide every 20 seconds without even more breakdowns or without doing it with screens. Less is more here and the inferences work just fine, to me.
Like I said, the new update isn't perfect. I'm still not totally sold on Predator Cove or a few other elements of the attraction. But the main storyline and interactions with the animals are more or less fine, or at least equal to what was there before.
I don't think it's quite as polished a product as what could have been (due to them rushing it) so I'll concede that much, at least. But poor JP was in a state of neglect. In a perfect world, JP would have been fully restored to it's original glory with new, impressive figures like the Indominus. But when you compare how things were falling apart with JP in the final years of it's life to what we've been given now: it's an overall plus. If they can keep it maintained.