We will share and munch throughout the day, its hot who really wants to have a big heavy meal in the afternoon.
Epcot - We will either split loaded nachos in Mexico or Fish & Chips in England. Sunshine Seasons is usually pretty good, lots of choices.
Via Napoli, is definitely good and shareable, only pizza I will eat in Disney.
AK - Satuli or we will order the fried rice and egg rolls at Yak & Yeti quick service.
DHS - Backlot for something quick maybe share chicken nuggets and fries.
MK - Will split something here, used to do Columbia Harbour House, but everyone else has figured that out too!!! Also depending on how much time you have, its worth a monorail trip to the Contemporary or Poly for their quick services.
DS - We will split Daily Poutine as a munchie. Polite Pig is good. I dont go to Blaze as we have multiple at home, but if we didnt not a bad option. Same with the D-luxe burger, lots of burger joints near me, but it looks good from what i have seen.
Some times smaller meals to share and munch as you go is not a bad option, especially in the heat.