I do beleive that having a discount for DVC Members on any/all of the Dining Plans would be an awesome perk.
I notice a lot of discussion about people going down who do not use the Dining Plan and stick to OOP costs or use the TiW. I myself did a HUGE comparison of the costs of all three and in the end realized that all that work was really for nothing because what you save is a few dollars. It all depends on how you eat.
However, I also think it might be a good incentive to get people to use the Dining plan more and maybe get back some of those who do not use it much anymore. A little discount under the "peak/non-peak" season thing shouldn't be too much of a stretch.
We have received a bit of a discount the past 2 years on the Peak Season DP - DVC members pay the regular price of $45.99 all year round, for the DP, no matter what season it is, so that's a "little" discount.
Tiger