So there's an ongoing issue where, if I bind heavy melee attack to left-click, it unbinds left-click to fire. Since you cannot fire at all in melee mode, and you cannot heavy attack in gun mode, it should not be making these bindings exclusive and it is a bug. Previously, I could get around this by just holding melee to heavy attack. Now this seems to no longer be working. There's a new switch "melee with fire weapon input". What this seems to do is bind left-click to regular melee while in melee mode. Great, now I have TWO buttons for regular melee, and still no way of doing a heavy melee without adding an additional key somewhere.