I reckon some of the smaller ones might be heated but I can't see them doing that to the monster main pool - hope I am wrong, you might call them...
Not surprised about the rates and points given your dates.
You might want to read one of my favorite travel writer's very detailed sagas (4 or so parts) about Orlando / Disney come the holidays. If you aren't going there for the parks or family, I would consider anywhere else! Good luck.
http://allenontravel.blogspot.com/20...1-orlando.html