Wanting to know as well. I was able to score Mytho reservations on the 31st last week. Maybe a good sign? I figure City Walk would be crowded but might be fun.
We went today, it was soooo crowded. We have premier passes though, so the after 4 express was awesome! Posted wait at Jurassic River ride was 100 minutes, we waited 10 minutes.
We have friends who stay for three weeks over Christmas/New Year........after last couple of years they plan to go stay in St Pete's for 3 days including NYE.......far too busy for them.....and they're used to crowds this time of year.