Although we have been to WDW every T-giving weekend + Monday for the past 6 years, the changes between the original Early Entry program, the lack of one, the return of the revised one, and now the newest version, Extra Magic Hours, have constantly changed the crowd flows and are harder to predict.
Expect MK to be very heavy on that Sunday. Sunday has been a great day for Epcot this year, and will probably continue. When Monday was an EE day, the MK was absolutely packed on the Monday after T-giving.
Sorry that I haven't really helped that much, but guests are constantly adapting to the changing EE programs.