Along with the ability to perform assisinations, it would be nice to have some sort of immediate defense against it as well.
I find myself all too often trying to outrun someone that is behind me. They are so close to me once I finally see them on my radar that I have no choice. I can't turn around fast enough to respond.
Maybe if I could throw an elbow back? Or swing the knife out in a backhand fashion.
Just an idea.