I haven't stayed there since the rebuild, but have walked through and thought they did a nice job on the rebuild. Word on Cozumel is that they are spending $30 million on the rebuild. Most of the bad comments on Trip Advisor are dated before Wilma cleaned out the place. The hotel was also opperated by another company that declared bankruptcy at that time.
As for the potential of a hard sale of timeshares, a firm no should be enough. If you are asked again, a quick and polite conversation with the manager will put an end to it.
Remeber, you paid for your vacationand did not agree to be bothered by salesmen for a discount.