We haven't bought into
DVC yet, but we visit at least once a year. For the last three years, we have paid cash through Disney for a 1 bedroom villa for our 8-10 day stays (BLT twice, BWV once), so I have definitely been looking into buying.
We have looked at Riviera, and as someone who does not currently own DVC, I can say that the resale restrictions don't enter into my calculations at all. I'm not buying a depreciating asset (which this very much is, even though DVC has retained a much larger percentage of its value than other timeshares) with the intention of selling. I'm buying it to use it, and the value is in the vacations we will take, which are definitely not investments! I'm only buying if I can afford to lose it entirely.
What would make a significant difference to me is a drastic reduction in the per point cost. At the moment, for the number of Riviera points I would need, I calculate that it would take 12 years of booking 1 bdr villas direct through Disney before I come out ahead with DVC. An upfront cost of ~$60,000 to start saving money 12 years from now is not at all attractive. I'm much better off investing the $60,000 and continuing to book with cash. Bring that upfront price down significantly, and we'd reconsider.