theres more than a couple things u can argue over BM, especially pertaining to 29 arena teams vs other 29 duos in 2s(or 3s if u randomly get to do some)as in fair games no f2ps pre qued teams vs others... spriest, feral, WW monk, enhance sham, id argue any of those to be as strong or potentially stronger under a lot of circumstance... bm is just the blood dk of 29, most "irritating" but not the strongest spec.... WW atm is godly
the bm's just have control over perma slow, and defensive control but practically 0 offensive control over a fight, when compared with the other strong top tier classes
an example is that BM disc in 2s is good, but ive beaten it consistantly as rogue/priest (somehow rofl, long game most times zzz) but if it was a equivalent WW monk to that same BM, same player even just with a spec change, WW/Disc would have likely farmed me, instead of going like 1 win 10 losses vs us