"Rethemed and Re-constructed' isn't a refurbishment though, that is what you brought up on the original post as I will correct you in that.
As for if it'd be wise to re theme it to Jurassic World? I am starting to get the feeling more and more, that it may not be impossible that we could see the original Jurassic Park IP removed from Islands, and is relocated to be a major presence at the fourth park in Universal's catalog under the JW likeness.
Then, that would leave the question; what could you do with the space that's there? In theory, that'd be at best, a 14 acre plot to do something completely new; so if they choose to go the way of the Amity Island. And with various IP's that Universal has under it's belt (alongside those that they have externally or potentially able to get), they could do something big for IOA that would rejuvenate the park in more way's like one, almost like how Hogsmeade did that for IOA not too long ago.