Another possibility for your Studios meal is to go to Cape May at the Beach Club. The buffet is great, and it would give you an opportunity to see the amazing chocolate carousel in the lobby during the holidays. It's easy to get to or from DHS from there. The Osborne Lights Spectacular is, well, spectacular!
I would also recommend "brunch" at Kona Cafe. Last December we booked it at 11am on an early EMH day at MK so we were at the MK from 8-10:30am, and then had an 11am breakfast of tonga toast and pineapple macadamia nut pancakes. From there we took the monorail to the GF so we could see the lifesize gingerbread house for the holidays before heading back to the MK. Just some thoughts.