So for what it’s worth I’ve predominatly played tanks. I played this brewmaster for a ton of +8/9 keys last season because I was after the gilded crests. Now at that level my healer in my group (Bonegrundle) told me that they found it pretty easy to heal me.
Even in what you’ve linked Brewmasters are at 1/2 the representation of the next tank up. The people playing Brewmaster play it because they love it.
Now having then played Protection Paladin, snap threat through AS and DT. Huge part of mit is just standing in my Consecrate and using defensives.
Also playing Blood DK, albiet only at tanking +7s so far. Also great because I have strong self heal, can grip to pull things in and to soft int them while giving the party big magic damage reduction through AMZ/AMS (can opt into share shields). Only thing Brewmaster can do that’s good is increase melee dmg taken on enemies (which maybe could work on a Arms+Ret+Ench + Rsham comp).
A big reason i’ve made this character just a delver this season is just there’s no point in trying to push for the love of the class. It’s extra effort for 0 payoff.