I believe part of the issue was it wasn’t going to be the best vehicle to tell the story.
Besides a lower throughput, there would’ve been less scenes, I think by half, even with a similar track layout.
Because you could’ve seen out a much wider view, show scenes were twice as large, with scenery on both sides of the ride vehicle. With the SpiderMan vehicle, they’re able to direct your attention towards the action, just like Disney’s omnimover does.
So, we wouldn’t have gotten the chasing I-Rex. We might not have gotten the smaller moments like the ankylosaurus.
And the system was going to have ride vehicles that we’re shaped like Gyrospheres, but we’re suspended from a track above, so I wonder if sightlines for track supports above getting in view of looking at tall dinos make it essentially unworkable in reality.