There were BRDs in the group for the world firsts of A1S, A2S, and A3S. I won't be surprised if there is one for A4S.
I see statics in PF looking for BRD and MCH all the time. This may be because there are less people playing it now, but there is certainly demand for the classes at least (compare with how basically nobody wants AST at the moment-- they are excluded from lots of groups.)

I think MCH is in a good place from a design perspective because the class has been designed with GB in mind. They just need to make MCH's DPS a little bit more consistent, and less dependent on huge Wildfire bursts, and I think it will be in a really good place.

BRD is a harder one because frankly the class doesn't seem like it was "designed" with WM in mind, rather WM was simply thrown on there without much thought to how it would work with the class' existing toolkit. It needs more work I think.