I think a park break and lunch at a nearby resort area is a terrific idea, especially with spring break crowds!
While you're visiting MK:
Contempo Cafe at the Contemporary - seasonal cupcakes, entrees are good, fantastic atmosphere with the monorails whizzing by
Captain Cook's at the Polynesian - pulled pork nachos, Dole Whips at the nearby Pineapple Lanai
Epcot:
Honestly, with all the fabulous choices at World Showcase I would not leave.
DHS:
Boardwalk Bakery - the sandwiches are delicious, so are the cupcakes
Boardwalk To Go Snack Kiosk - BBQ sandwich and fried macaroni and cheese bites (OMG soooo good!)
AK:
It could be fun to take the short bus ride over to AKL and take a look around and relax. The Mara is quite good and worth having a meal, however staying at AK and having lunch at Flame Tree is terrific too.
DS:
Wolfgang Puck Express is the best counter service at WDW. Good wine list, food that is a notch or three above, and partial table service (you order your food at a counter and get your own soda but everything else is brought to the table on real plates, a big deal for me.
AoA:
Unfortunately, I do not recommend the CS here. We actually went off property and ate at an Outback Steakhouse rather than go back to our resort and eat, and we never do that sort of thing.