The mechanics of bullet sponges. The bosses have insta kill close quarters attacks and easy kill long range attacks. The only thing bungie did with the nerf was make the bosses longer an more annoying. The only option with the bosses we have is to hide then pop out and DPS with nukes. I understand what you are saying and would agree if the bosses had more interesting mechanics. Right now the only bosses that are not bullet sponges and require though on how to beat them are raid bosses. The only two reasons for the nerf would be 1) marketing Or 2) they will be changing the bosses so that there are more viable ways besides nukes to beat them. I hope that the second option is the correct one but I think the more realistic option is the first.