I'm a DVC owner and I won't tell you discounts aren't available. They are - we've used them. Disney keeps about 4% of DVC rooms available through CRO to sell as regular hotel stays. Sometimes these are available at discounts and sometimes they aren't. If the resorts fill with regular DVC requests, Disney may turn unused rooms back to DVC, and vise versa. SSR is one of the larger DVC resorts, so discounts are more likely to be available.
If the villas are available and discounted, go for it. But even with a discount they'll still be in the higher price range when compared to the hotels.
DisFlan