Yorick Rework isn't going to be live this patch is it?

No. It's not.

I doubt Pros would have picked him if he was available anyway. Unless new Yorick is like SUPER OP or the pros just want to throw games for laughs, they wouldn't add an unknown element into their team comps & strategies when they're trying to win Worlds anyway. They need time to evaluate Yorick & see if he's worth picking as well as learning him if they do determine he's a good pick.

My guess is nope because they would have replace the old Yorick files with the new one.

That's a very good question. We have seen Yorick occasionally in the EU LCS before.