I see all these posts about people computing the "value" of the new DP. In almost every case, you have to pad the DP with CS deserts (That most people won't eat anyway) and expensive meals to make it into a "Value". The bottom line is, you are on vacation. If you have to do math to decide a few dollars, it isn't worth it.
I think there is "math," and then there is "math."
To me, the only "real" math is to compare what you would normally expect to spend
paying cash for what you would really eat to the cost of DDP. If the DDP number is lower, then DDP is a good deal financially. If you would spend less money -- eating what you would
really eat in the real world -- paying cash, then DDP is not a good value financially.
Too often, we see people comparing the cost of DDP to the inflated menu prices of the WDW restaurants. That is not a valid comparison unless you REALLY would eat in those restaurants and order exactly the same thing you would get with DDP
In addition...if you have to pay
more for your room than you could get otherwise, that is a cost of DDP. If you have to
buy park tickets you would not otherwise buy, that is a cost of DDP.
The value of DDP (it seems to me) depends almost as much on what your options are as it does on the numbers.
For example, if you are an AP holder who always rents a car at WDW, you have many more options that a fly-in/DME captive audience does not have. You can get much cheaper rooms, you don't need park tickets, and you can eat offsite -- where you will often find better food for lower prices.
OTOH, if you ARE a captive audience, DDP might work well for your family.
Everyone just needs to do their own math. DDP is not a one-size-fits-all ideal solution (nor was it ever meant to be), and there are several other options that may better meet your needs.
Having said all of that, I think it's also appropriate to remember that there are
other legitimate reasons for using DDP than pure financial calculations. All the times (4) we've used DDP, we only realized a small financial advantage. BUT...we had our food cost set prior to the trip, we found DDP very convenient to use, and we enjoyed dining in restaurants we probably never would have tried without DDP. Those are legitimate benefits.
We're over all that now, and will not be using DDP going forward (and will rarely dine onsite) because the plan no longer benefits us. But that does not mean it is not good for someone else's family.