Brewmasters are currently a Damage Dealer with insane survival in PvE, so they really don't need that change.
I can see Vengeance being scrapped soon. It was (if I recall) almost seen as a temporary fix when implemented. With active mitigation almost incorporated into every tanking class neatly, they can then put some time into Tank DPS, and scrap Vengeance, which is a mechanic I personally think sucks ass.