Tedronai, I'm not sure that my rule necessarily conflicts with the narrative focus, though. I will concede that yes, there exists the possibility of conflict, but we haven't seen that so far (then again, are campaign is only a few sessions old).
My rule is actually closer to your point than you think. Does it make narrative sense for a BCV (a normal one, not a master like Mavra) to just leave a fallen enemy where they are and move on? I don't think so. They feed, and thus would kill my players that they defeated. Now, I'm not going to let that happen if there are other players still up and running and able to stop it. But if every one of them was taken out, and they weren't able to get out of there, you better believe that I'm going to show my players the consequences of going into a fight unprepared.