Most of these I can’t help with, but I’ll try to take a run at the Barrow King tomorrow (and the Midnight Grove Werewolf).
I saw a video earlier today where @Wak4863 was (post patch) fighting the three sideroom bosses from the Warmaker’s Sanctuary - all looked good there. Hopefully someone on Siptah can take a run at the Grey Ones, see if they’ve remembered how to use weapons yet.
(Can anyone else think of other bosses that have been fist-fighting recently?)
Can confirm Barrow King is weaponized, waited 5 minutes to kill him again to make sure. Side note, he drops the crown AND when you hack him up with a tool he gives you another crown, pretty weird. Also on this character i havent been to his little cave yet. I didnt get the “You discovered this area” splash text until after i was exiting his cave after i had killed him.
As for bosses on Xbox, Rotbranch at Shattered Springs was performing the arm swinging attack again instead of just sitting there but he still did not do the branch attack. Gave him plenty of time to trigger it.
Just to confirm - Werewolf in the Midnight Grove and Barrow King are both attacking as they should. (For the brief time they got to attack - I’d forgotten how OP a fully levelled and equipped character is, lol - my main game’s on very slow XP…)