I'm a bit of a stickler for points on the scoreboard.
I keep thinking to myself, "it would be neat if crippling backstabs awarded +1 bonus point" because it doesn't even give assist credit sometimes (only if someone else kills like immediately after)
Scouts still get bonus for stuns, heavies get bonus for sandvich tosses, spy just gets 2 points on successful backstab kill, and nothing if it's just a cripple.