Move the scoreboard to the center left to get it out of the way. Use smaller fonts to give a bit more room. Automatically calculate the desired width of the scoreboard columns such that it always fits on the screen.
Rank the scoreboard by style instead of by kills. Show super stylish kill streaks on the right of the scoreboard.
Reduce style points required for activation.
I think it's good if it's at least partially opaque so that the player has an idea of where his body is.
Repaint the death notices with weapon names instead of images.