I love the original Jurassic Park and River Adventure is my favorite theme park ride of all-time. With that being said, I would absolutely be okay with a Jurassic World update. In fact, I think I would be extremely excited. Imagine updating all the AAs and adding the I-Rex and Mosasaurus into the ride. You could also change the raptors in the ride to be Blue, Echo, Delta, and Charlie. You could re-do the line and integrate the newer characters of Owen, Claire, Hoskins, and Masrani while leaving in a "pre-recorded" spiel (one of the videos from the current wait) from John Hammond to pay homage. The basis of this ride could be that this is the only attraction from the old park that was revamped or it could make reference to the tragedy of the original river adventure (having to evacuate guests that nearly escaped from a T-rex).
As sad as it would be to see the old river adventure go, sometimes you've got to upgrade. Considering World will likely be the highest grossing film of all-time and anything involving Chris Pratt will be gigantic, it's time for the overhaul. It will ruffle some feathers, but as Hoskins said in JW "This is happening with or without you."