I think those dates will be great! We were there last year the 15-22 and the only time we really noticed crowds was Friday night the 21st at Epcot.
MVMCP--I want to say the dates come out in May, but I am not 100% on that. I was really sick that night so we rode some rides, watched Wishes and left. The parade is supposed to be really good.
Cinderella Castle Lights is my favorite thing!!! They do a little show when they turn the lights on. It is cute if you can see it, but not something to arrange the day around.
Osborne Lights--DH's favorite thing (and a close second for me). Amazing!!!! Pictures do not do it justice!!! We saw them 3 different nights.
CP--In 2011 DB and I waited in line for 2.5 hours to see NPH as our narrator. So good! DH had no interest last year so we skipped it. The dinner package is recommended if you know you want to see it, but dont want to stand in line.
Holiday storytellers are fun too. I have only seen a couple of them. We just dont spend much time in Epcot.
I think every resort has a tree and some decorations. GF has the gingerbread house and BC has a carousel. CR and Poly arent super exciting, but they are so easy to see if you are doing GF anyway. WL has a huge tree and is just so cozy and warm. The campers at Fort Wilderness do tons of decorations. There are carriage rides you can take to see them. Maybe you can ride the bus too?
Each park has a giant tree too. Not sure if they are still there, but in Camp Minnie-Mickey in AK there are Christmas trees for different characters. Very cute!!
Oh and Santa Goofy! He was at the Osborne Lights last year. I think before that he has been at AK.
Why am I going in February again?!