I just recently priced it out and I cannot see how it is worth it. My husband is a chef and we LOVE to eat. So unless you plan on spending all your time running around and eating...it's just not worth the $$. If you want convinence...maybe...but to get you $$ value out of it, I can't see how. By may calculations it's better to do the regular plan and pay out of pocket for the extras. IMHO they really need a plan in between Regular and the Deluxe... like Regular +
In the end, it all comes down to how you dine. It's a strong value, but only if you allow it to be. If you aren't planning (or willing) to work the plan as intended, then it's not the best choice as you have discovered

.
The key is to use the plan as designed and, in the case of DxDDP, plan to spend at least 2/3 of the credits at TS locations. Now, if the plan doesn't fit you, I wholeheartedly agree not to spend the extra money and/or time. As my mantra has been, "Pick a plan to fit your dining, don't fit your dining for a plan".
For myself, I plotted out where I want to go and what I wanted to eat (roughly, being super picky makes this easy for me though

). I recognized the time investment in each location, and decided that Deluxe for this trip would be best (after much much math and creating an "uber" spreadsheet to handle it all).. Of course, I'm going solo (well, half solo, half the trip my mom will be around), so that makes some considerations much easier. I'll be spending around $740 on the meals (including tip, snacks, and any planned OOP expenses), if I went with this plan, paying OOP I'd be spending just over $908. Of course, if I were paying OOP, I'd likely adjust what I ordered and where I went. That plan was down at $485 (cut out several TS restaurants, cut out apps and/or desserts at several places, picked cheaper restaurants and/or menu options, etc). I did figure that the extra $255 was worth it for the experiences though. (As I wanted to eat at those locations, not I picked the locations because I had the plan

)
The
DDP and DxDDP (along with QSDP) cover the bases pretty well. I'm guessing that Disney makes a little extra with the.. um, extras? for DDP people and isn't likely going to give that up. (Of course, who knows really

) There's a bit of wiggle room too with DxDDP where it sometimes is advantageous to use that even with planning on several left over credits.
To make a long post short (too late!), you can easily come out ahead on the DxDDP (even easier than on the DDP). But it does require a larger time, money, and pre-planning investment and is only sensible if you're planning to dine in that way in the first place.
Am I the only one who ran out of credits on DxDP?
DxDP require some strategic planning from ADR to which park you plan to visit. If you can plan accordingly, that eliminate a lot of running around.
On our last trip, not only we ran out of credit and we have to paid one breakfast OOP. We also used up all the snack credits as well. Next trip, we will be doing 11 days DxDP and we already have 26 ADRs. Credit is already running low. We might have to pay one meal OOP again.
I'm close as it is

. Including a few CS meals, I'm pushing 22 credits used, on an 8 night trip (24 credits given). Of course, some of those CS are "if I'm hungry between the early breakfast and later dinner" types, and may not get spent.