you have almost half your trip with table service meals, already; so, I think I would do the basic DP plus over the QS plan. Usually, most people don't eat more than two meals a day. If you do QS plan, you're up three meals before you even start with your OOP meals; so, you will either have to eat more or forgo some credits. To me it doesn't make sense.
Okay, I understand you may not want to be locked in everyday with an ADR, but from a financial perspective it makes more sense to have all your meals in a plan and not pay out of pocket except for appetizer or alcoholic drinks, etc. I would think a nice rest at a TS restaurant would rejuvenate everyone. You would incur more tip money doing 7 days of TS, but I think you would have better memories of the dining experience at Disney. For $13 you can get one resort mug that you can share. You can at TS exceed the price of the plan portion for it and be even more ahead using the plan. We have spent $60 real dollars for a day and only pay $40 with the plan. It really depends where you eat and what you pick out.
You can, although it's a hit on the basic DP plus, get a QS meal for a TS in some places (mostly your resort food courts). Sometimes it's not so bad to do it, if you order expensive QS.
If you are very light eaters, then it might be better to wing it.
I would look at the menus and do the math in your case.