I think that is where the analysts come in, as much as I normally hate them, they are already pointing out that Occupancy and Attendance is down at WDW and are clearly blaming price increases. If Disney gets too aggressive that will be detrimental to Occupancy and Attendance which needs to grow over the next 2 years before SWL opens.
My bet is that Parking fees hit Poly, GF, Contemporary, and WL for non-DVC stays and maybe Boardwalk. And that the other hotels with ample parking are left alone until SWL opens.
I also wouldn't be surprised to see paid incremental FP+ by the day SWL opens.