Obviously the biggest issue and like
@AnnaS I am surprised that you were not offered another unit earlier. I am curious....did you ask to be moved after Engineering failed to resolve the issue the first time?
In all our years of ownership (since 2008) we've never had an issue that made our villa uninhabitable so I can't speak to compensation.
'Close to the elevator' is a popular request...particular in resorts like SSR which have only one set of elevators. That said, sometimes they are more successful in granting our requests than others.
Standard Operating Procedure for all of our timeshares...not just DVC. Though I would be surprised if they actually grant late checkouts to cash guests...I'm guessing that's just something they told you.