What park are you planning to attend on NYE day?
We were at Epcot last year and there were very few seatings left at any restaurant at 10:00 am in the morning. Like you, we had made PS well in advance. You may want to consider having lunch PS also. Those will be gone also.
We did Chefs de France for dinner and it was excellent. The only damper on the evening was the 4 inches of rain.
FYI, MK, MGM, and Epcot all were limiting admission to the parks on NYE day due to high crowd levels.
Troy