Everyone has this idea that this is all DVC is... but the only resorts they've done this at are AKL Jambo, Polynesian and now WL Boulder Ridge. The other 11-13 DVC resorts were built from the ground up.
Also I don't see much reason to criticize even changing existing rooms tbh. Any regular joe off the street can still get one of those (upgraded to DVC standards) rooms and the facilities around the resorts have seen many improvements each time they convert from hotel to DVC, seen right now with the WL conversion by adding a better pool and a new quick service and a new table service.