What if the Shavepate is actually the Harpy? He is using the Brazen Beasts to execute people in Dany's army he deems expendable to try and kill all of the major nobles in Mereen. I really hope Skahaz does go on a rampage and Barristan chases after him. I don't think Skahaz will be executed though. He will be give Lord Paramount of Slaver's Bay or Warden of the Slaver's Bay