There may be some demographic issues for Disney to consider.
Many of us who joined DVC 8-10 years ago now have kids in college. With the passage of time, more and more DVC families will be in the same boat. At this point, the theme parks have become much less compelling. Where we'd buy AP's and plan two year's vacations so we could get them both within the AP year, we now would get significantly less value from these passes.
We recently stayed at OKW for 4 days, relaxed by the quiet pool, and never went into a park. We went off property for a few events. If there was a reasonable AP option we certainly would have considered going into EPCOT to dine. Perhaps Disney could offer an "after 5" pass for folks like us. Frankly we're not interested in Tower of Terror or thrill rides, but we love the ambiance of the parks and many of the non-thrill attractions.
So, from a strictly economic standpoint, which is how Disney should primarily look at it, there might well be value in offering several different types of passes to DVC members that take into account that DVC members will be aging and that their tastes and desires will change as they age. Why not look at 10 year member passes, 20 year member passes, 5 PM on passes, etc. etc, with the benefits geared to the age groups of these members.
In about 5-10 years, many of the first DVC purcashers will be retirees. These retirees will have much greater freedom to visit DVC during non-peak times. Disney should be thinking of incentives to bring them into the parks during these times. This could be a win-win for both Disney and DVC members. Like most free market economic issues, it has less to do with greed and much more to do with what is most profitable for the seller and most desirable for the purchaser.