Your math is wrong, since you're adding retail prices on top of the discounted DDP plan to justify the small difference your math creates. Doing it the other way, working back from DxDP, you can come to a different conclusion with similarly specious results. Take the deluxe plan, subtract the cost of one table service meal, on average $35 (calculated by using $15 for breakfast, and $45 for each of the other two meals), and you're now saving $35 per day. Even if you took the price of the cheapest meal off, breakfast at $15, that's still $15 in savings at FULL RETAIL. So, just as wrong as the way you've calculated it upwards from DDP. Mixing the "25-30% savings" discounted number with full retail prices isn't the way to do it.
Going back to the original point, Disney's 3 table service plan is designed for one of two types of diner: 1. the type who can actually eat 3 meals a day (which is VERY few people) or 2. the type who eats a TS and a signature. When we last went, in December 2011, the average we "spent" for each day was $115 per person. We were type 2 people on DxDP. The price then was, IIRC, around $85 per day per person. That coincides with the advertised savings of 25-30%. Now, if I had only two credits per day, I'd use them for 2 sit down meals. The average "spend" on a sit down meal was $45 per person when we went in December 2011. That means $90 per day per person. Add in the cost of the two snacks a day at $8, brings you to $98 retail. Subtract 30% for the savings, and you're now at about $68 per day. In December 2011, the price of the DDP was about $53 This new plan slots in almost perfectly half way between the $53 DDP and the $85 DxDP. The advantages this plan offers are many:
1. It is closer to the original DDP than any existing plan.
2. It is optimized for people who eat normally, and don't necessarily want to eat in signature restaurants.
3. It allows the patron to avoid QS entirely if they want, but still allows them the opportunity to have that if they chose.
4. It's doesn't prevent the patron from buying OOP the "missing" meal if they desire it.
If Disney were to offer this in 2013, it would be about $75, since the DDP is $56, and DxDP (which has undergone a HUGE price increase) is now $99.