I really have no idea, the BH is powerful but very situational when it comes to strike, nightfall, PoE bosses but I've never thought while using the weapon " holy shit, this is so easy, this weapon is completely OP." I think it works just fine as it is but like you I have no experience in what TTK has to offer so maybe the blackhammer adjustment will be made for a common good. I'm trying not to be pessimistic and assume Bungie is killing old weapons to make room for new TTK weapons which hopefully are more diverse and engaging.