I really don't see why this is getting nerfed at all. Who can convince me? It makes no sense...
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I'll answer your question with a question and then make an assumption. Is using the current black hammer fun? Assuming you said yes then that is your answer. Everything that makes end game content fun is nerfed by Bungie. They hate fun. The first thing they did to make the game fun was make shotguns awesome in pve. They're altering that now. You have guns like icebreaker, gjallarhorn, and black hammer that make endgame content a lot of fun to play, and fun isn't what Bungie is about anymore.