People are dooming extremely hard about how “bad” Brewmaster is, and as a result most of the criticisms are far over exaggerated.
The biggest weaknesses of Brewmaster are lacking AoE scaling that other tanks have and lacking meaningful/unique utility that isn’t niche. These don’t become real hindrances until fairly high keys, at a minimum 12+.
Tank rankings on tier lists are arbitrary and unless the spec is quite literally unable to perform you’re going to be fine with it.
Brewmaster is quite survivable and one of the tankier feeling tanks this season in my experience. Not sure where you’re hearing they’re weak unless people are just playing the spec improperly.
This is 100% false speaking from experience
I’ve been doing 13s and 14s with no “defensive” trinket just fine, and even higher up Equinox is doing 17s with double damage/hybrid trinkets just fine. The ability to carry a poorly performing tank caps off significantly sooner than you could carry a low DPS player, arguably even before 10 depending on the dungeon.
Brewmaster is the second highest damage tank in M+ right now and is usually #1. The “problem” is that it’s a much more involved rotation and people are likely messing it up, or they’re trying to shave off buttons and going for the noob trap PTA, or overpressing SCK/underpressing BoK, lots of potential problems. I’ve been hovering around 1.1m-1.35m overall at the end of dungeons lately and I’m definitely not playing 100% perfectly. I’ve seen Equinox end some dungeons as high as 1.7m. It’s a very high damage tank.
Tank changes as a whole are usually some of the last to get pushed to the PTR. Considering we’ve only seen the very first preliminary patch notes, it’s a bit early to doom about this. Even then, the tier set for Brew is looking quite promising and the BoK → TP → BoK → TP chain that it will enable will be a significant burst of Prio damage, which is the most valuable kind of damage.
Unless you’re aiming for literal world first top <0.1% keys, the spec is more than capable of doing what you’re trying to do. It might require a bit more effort/consciousness than other tanks, but it’s also significantly more enjoyable to play (imo) which makes it feel worth it. The extent of it’s problems, as I said, don’t really come into noticeable effect until at least 12s, though really later than that. It’s consistently one of if not the best raid/boss tank due to how stagger functions.
TL;DR just play what you enjoy. If you like Brew, go for it.