I think that talent for murder should stay at the very least. That is really the VIIIth legion in a nut shell, preying on the weak and avoiding a fair fight. That is also where Life Before Honor also comes in, they don't fight fair and they don't go picking fights they cant win just cause. The CSM rule is really only for the marines that worship the dark gods praying for deamonic gifts. I cant really see most Night Lords risking their life in a fair fight for rewards from gods that they don't even like.