We been there several time during the holidays, both Thanksgiving and Christmas.
Liberty Tree serves the holiday type meal year around.
All the buffets, will be having all the holiday basic's, and some twist to the normal offerings. Chef Mickeys, 1900 Park Fare, Crystal Palace, and Tusker house, we have had a meals here during on Christmas and Christmas Eve. Quite good, and service was great.
Normally if a special meal for Thanksgiving is being offered those same restaurant's will be offering something special for Christmas.
As far as the 2ts restaurant's, We did have Christmas Eve dinner one year at Calli grill ( before the refurb.) there was a special offering of some sort of Turkey dish, My DBIL got it and it was not what you would have expected from a 2TS restaurant.
PS There is nothing like being on main street on Christmas eve, have a wonderful and magical trip.