We went non-DDP in May, due to 2008 changes and also to the standardization of the menus over the last couple of years. It's getting to where it doesn't matter which restaurant you choose, the food is the same...and that's as big a loss as the financial changes.
Having done WDW without DDP, we won't be going back to the dining plan.
We just ate better, had much more variety, had two spectacular fine-dining meals (better than anything Disney has to offer), and were a lot more spontaneous. We did one character breakfast OOP (Norway), and we ate a couple of CS meals and a bunch of snacks OOP. The rest of our main meals (dinner for us) were at typical national chain TS restaurants.
For us, that was perfect.
As far as next year, I look for a modest price increase, continued standardization and downsizing of the menus, and not much else. They could try to emphasize the Deluxe DDP more, and to make it really the only viable option, but I certainly don't expect any improvement with the basic DDP.