Sure they can. My guess is they only do so under unusual circumstances (for example, obviously, if a room became uninhabitable). I know of no published statistics showing what they historically do, so no one but Disney knows, it just seems like there haven't been posts over the years about people who had their room changed, so based on that very unscientific feeling my guess is you can almost certainly depend on that to be your stateroom. Research it and get excited! Hope you like the location.