I don't think UFC wants Barnett to have anything to do with possibly winning any type of UFC gold for obvious reasons regarding his past.
IDK. Why bringing him into the org, then? If the bosses can get rid of any fighter currently in UFC giving little to none stupid reason, why to bring someone from from SF they despise and rank him? The potential for a title shot is right there.
I think the show is more important to Dana and the Fertittas for it will bring audience and money.
So many champs UFC had a problem with and still granted them other chances: Tito, Forrest, Brock and even Anderson, who got his job on the line for the Abu Dhabi incident.