Hello, Stephanie!
My goodness, you must have done your research, because this is a fantastic plan!
From your question, it appears that you'll be on the Dining Plan, so I suggest that you take a look at allearsnet.com for the menu choices for those Quick-Service meals; the value and selection for your QS entitlements vary greatly from park to park as well as from restaurant to restaurant. For example, the options at Sunshine Seasons, in Epcot, will most likely please everyone in your group, and the food is not only impressive for a QS, it's also delicious and fresh. The desserts alone there will let you see what a gem this place is in the world of Quick-Service dining!
I also suggest that you take a look at
Downtown Disney, where you'll find so many fabulous Table-Service options as well as one of our absolute favorite Quick-Service restaurants: Wolfgang Puck Express-Marketplace. Not to be confused with Puck's Table-Service restaurant, The Dining Room at Wolfgang Puck Cafe, Wolfgang Puck Express-Marketplace provides Table-Service quality food and dining experience, yet it counts as a QS. Take a look at that menu, too, on allears.net, and you'll see what I mean!
Finally, let me know if you'd like suggestions on how to maximize the value of your snack choices, too. There are some really amazing options in the parks, resorts and at Downtown Disney, as long as you know to hold onto those snack entitlements for a really great choice!
By the way, you will be amazed by the holiday decorations in the parks and resorts in December! Have a fabulous time!