No, in no way. Disney wants you to think you save (you don't), they want you to think it's so easy to not worry about expenses (there's really no difference), and they want you to spend a couple of hundred dollars per day, every single day, for a family to eat. Wow.
Probably the best thing to do is not set up a spreadsheet, pore over menus, and all the other things people try to do to justify the plan. Instead, take the hundreds or even over a thousand dollars the meal plan would cost you, and put it in your pocket, and add say 15% or so for the tips since they are no longer in the
DDP. Eat what you want, when you want. Don't scrimp, don't stress, don't skip a dessert, get snacks when you want, buy drinks as you go (the overpriced mugs tend to make you drink more than you normally would because it's "free").
At the end of the vacation look at all the money left over!
DDP was a brilliant marketing plan by Disney; it has increased their profits hugely, but the unfortunate downside is crowded restaurants, lower quality food offerings, and unreasonably high prices on buffets and character meals. But, that's done, and we have to live with what they offer now.
We eat royally at Disney, and love it, and never have come close to what we would have spent on the DDP. And we don't stress one iota.