In terms of other supports, her kit is extremely dps focused. Unlike the other offhealers, she has 3 ways to protect herself outside of her flail. She has her shield, her stun, and her knock back. But also at the same time her healing consistency is that of a main healer.
what I mean by that statement is, Lucy and zen both provide consistent healing (orb and music) but brig does not. She can only heal when she is dealing damage, and also when her armor packs are off of cool down.
I feel like brig just does the job of both support catagories to be completely honest here. She can output more heals than mercy, she can keep up with the tanks, she provides a defensive ult for her team, and she also deals more damage than lucio and zen.
My opinion of brig at the moment is that she feels like she does a bit too much. She can pump out crazy heals, deal a ton of damage, and provide a defensive ult. Tbh her line “a good defense is the best offense” is really where I feel like she is at. Brig is a defensive offense hero and it’s hard to stop right now.