I think all are still open
Most of them are open. There was only about 3 that were closed for the season. They have an app you can download and it tells which ones are closed.
Nitro, skull mountain, superman, green lantern, and the joker
Very less
There were more than 20 coasters open when I went there on Nov. 24. And I'm very confident the same coasters are open throughout the Xmas season.
Thanks! Your answer is awaiting moderation.