I don't think Universal Pictures has any say in the matter, but I understand your point.
The rumor of why Universal Creative is unsure of whether or not to re-theme the land in Islands of Adventure probably has more to do with whether or not a new Jurassic World land will be built at the new theme park being developed down the street. If it is, then keep JP as JP. If not, re-theme it to JW. I think it's that simple.
If Universal cared about the relevancy or success of films they turn into attractions, they wouldn't still be building Waterworld shows in new parks... or bringing a Jason Bourne show to USF. It's all about using as many of their IPs as possible for them, (regardless if it fits or makes sense in any way lol).