I'm going to be vague for the sake of spoilers, but the new scene didn't have all of the effects working in the POV. They already fixed it since it was fully working when I rode it, but when you see it live....oh man, you'll love it.
Good luck with that. For CM previews they require the Cast ID and tickets that the member has bought ahead of time. There might be a cast member who may have plenty of tickets and say "Hey, wanna ride?" But I don't think it's likely...unless a CM may have broken up with his significant other after getting the tix and has another to spare.