I'm from Nova Scotia... I'm sad that you live in Maine and don't like seafood Lol! We went to Coral Reef and the kids really enjoyed it. Sitting by the glass is nice but there are booths one level up that also have wonderful views. Our meals there were not memorable but the atmosphere made up for it. I would go to experience it... not every day you dine in an aquarium. The kids will think it is cool.
I would pick Tusker House for an early lunch. It is my son's favourite. If you pick it for breakfast that would be your 4th breakfast and there is only so many ways to dress up breakfast. The lunch buffet has some interesting selections that you may enjoy, something for everyone, and the characters are here for the children. We really did not enjoy CM last time. The food was just awful. I would enjoy the characters here instead of CM. However, I would definitely make a point of riding the monorail if you decide to forego CM. Skipper's Canteen seems like a better choice to me... but if the kids are fussy... well just peek at the menu. You could try for an Ohana dinner? Ride the monorail from the MK?
We all like Crystal Palace breakfast... it is my daughters favourite. The Pooh characters are so cute. The princess interaction is great at Askershus. My daughter had the basic package at the BBB during our princess trip and loved her princess bun... just something to consider

They made a big fuss over my son, which he liked, but would not admit. We have not been to H&V.
We are going to Sanaa this year and I am really looking forward to it. Also, I have booked a BOG lunch because I was too afraid Disney would mess with the hours and then my PPO breakfast would be useless.
On departure day, my kids just want to eat at the resort and enjoy a last dip in the pool and I think rushing around might make for a cranky end to a wonderful vacation.
I have changed my ressies a thousand times

... you are not alone Lol
Have a great vacation!