EPCOT can handle crowds well - but plan accordingly.
FP Test Track, Soarin and Mission Space.
Go on the Behind the Seeds Tour a walking tour of the "Living with the Land" attractions. You can get a discount with
AAA and AP.
Have ADR's for what ever meals you need.
Coral Reef is wonderful for lunch or dinner.
Garden Grill is great if you have little ones.
Romantic meal - LeCellier in France
Great view - Rose & Crown in England
EPCOT is the best park for Easter, Memorial Day, 4th of July, Labor Day, Thanksgiving and Christmas. - There are NO DDE meal discounts on US holidays.
BUT - the Swan/Dolphin restaurants (except Shula's & Blue Zoo) do give a 20% AAA discount any day of the year, including holidays. So take the Frienship boat from EPCOT (or walk) and make an ADR at a S/D restaurant for a meal.