I would pay OOP for the extras myself. I think it gives you a lot more freedom.
If you pay for the DxPP you will want to get your money's worth.
The
DDP is a lot of food. I just did the QSDP and it is a lot of food IMO.
If you pay for the DxPP you may force yourself to use all the credits and probably spend more time eating then you want to. You may end up eating more then you want to and eating when you are not hungry.
You may find that by the time you have sit down breakfast, lunch and dinner you do not want an app with dinner anyway.
Also do not forget to budget tips for all the sit down meals.
Keep in mind you can always get a pastry for breakfast with your snack credits.
I always bring a box of cereal bars for breakfast so I do not have to worry about it.
I've never been happy with the breakfast options myself anyway.
The other thing is a lot of the CS meals are very large and can be shared.
So for example you could share breakfast at main street bakery (large cinnamon role and ham and cheese croissant) and lunch at Cosmic Rays (the chicken and rib combo with two sides is huge) and still have 1 snack each.
If your big eaters, and I mean BIG eaters then it may be worth it to go DxPP.
As others have said also make sure you can get the ADRs you want before you commit.
You have until three days before you leave to upgrade.