I disagree.
The base framework is exactly what people have always said it is-unity among all people and cultures. There's nothing that can be misconstrued about that. Now, in time they may feel the need to update a few figures that may come to be perceived as insensitive, but there's nothing inherently tied to something at a foundational level that could lead the entire thing to be misconstrued as entirely racist or problematic.
Splash and Jungle Cruise had things that could clearly be pointed to and things that had been discussed by others in the past. For Splash, it was seen as a foundational component of the attraction. Jungle Cruise, less so. Which is why Splash is being totally redone and Jungle Cruise will mostly still be the same as always.
That's definitely true that there's been a lot of changes in a short amount of time, and the way Disney has come to view itself and the parks has changed. But I'm not convinced that this necessarily means that an infinite number of changes are coming.
So far as I'm concerned, the things that could be construed as problematic from a racial or societal perspective have been or are currently being dealt with. I'm not sure what else there really is other than maybe swapping out the Peter Pan Indians. So those sorts of changes, I think, are nearing their end.
Of course, I can't guarantee that I'll be correct in this, but in all honesty the only things that are iconic that I feel have a decent chance of outright removal is Lincoln-not because it's "not PC" or anything that people have said along those lines, but simply because, as much as everyone loves it, it's had popularity problems that date back to the 1970's (It would frankly probably be better preserved and attended at the Disney Family Museum at this point in all honesty)-and the subs, because of what an operational headache they are. Everything else may change or evolve or devolve but is likely here to stay, in my view.