It seems a lot of people aren't understanding that assignment.
It's not going to be anything that needs any sort of work beyond minor text cleanup. That puts a lot of fighter subs at disadvantage.
They are not redoing the brawler
They are not designing anything new that would need testing
PDK needs a wholesale redesign.
Brute never made it out of UA the first time.
Every Xanathar printed sub that made the jump to the PHB has ended up having UA work done to it (Zealot, Glamour, gloom stalker, celestial). Only Tasha subs have made it through "as printed" (Stars, clockwork, aberrant, fey wanderer)
Echo knight is explicitly tied to durnamancy/Exandria.
Gunslinger was never official.
Considering they aren't going to test fighter subs, our options end up one of the two Tasha subs or a Xanathar that isn't getting work done to it. Of those options, I think the Tasha ones have the best bet. But if WotC has done anything this UA cycle, it's be unpredictable.