I can appreciate why the island should have some "nothing goes wrong" attractions, and although I don't go to those attractions, I think they should stay. However, Jurassic Park is all about dinosaurs attacking people. If another attraction is added, it should follow this premise. I would like to see a "part 2" of JPRA. The dinosaurs are loose and wreaking havoc. You were able to escape the Rex and raptors in JPRA, but you obviously have not escaped the island. Part 2 should be that escape from the island.
After you exit JPRA, there could be an alternate exit that would take you to the escape ride. Of course you wouldn't have to ride JPRA first, but I think it would be a neat detail if one attraction led to the next.
On the escape ride, everyone could board SUVs similar to the ones the group took the tour in in JP1. The ride would start off with a quick attack from the raptors right off the bat, but nothing lengthy. Just a warm up. From there, the jeep drives through the jungle roads at the edge of control in the rain, which would be exciting enough due to anticipation of what is to come. Then suddenly a rex comes out of the jungle, and the SUV spins out of control and drives over a fallen limb. The SUV is stuck momentarily, and the rex takes the opportunity to rip the roof off the SUV. The driver tries to drive over the limb (would need a similar arrangement to Jaws), and just as the Rex is leaning down to try to get a snack, the driver breaks free of the limb and speeds off. The next scene would be similar to the chase seen also from JP1. Not sure how the escape from the Rex would end, I'll leave that up to the experts.
I think by combining some of these famous scenes from JP1 into one ride it would be a HIT. There probably isnt the space for this unless it's all a simulator, but I think what makes JPRA so cool is that the dinos are tangible. All the scenes couldn't have AA's, especially the chase scene, but I think if an AA Rex ripped off the SUV's roof and you see deep into it's mouth as it's leaning down to try to eat you would be AMAZING. It will never happen, but one can dream.