Now Jon Jones can finally become Exodia
No. Many are on the way to though. I think a list would have to be manually compiled by a journalist or something, cuz it's just too much for the public to find out other than on an individual basis
No they won't. The UFC plays by the rules of wherever they go and have not banned locations that don't use the unified rules. The majority do use Unified Rules, but the UFC has held events this year in NJ and Toronto, which both don't, so the fighters had to go by the Commission's rules.