I think it would be cool if you could make a combo shot during a certain mode that would take points away from your opponent(s) and award them to your score. Especially in tournament play.
I brought this up in the Cactus Canyon Continued thread as a joke but it kinda appeals to me.
There’s a lot of brilliant people out there and I assume someone must have already thought of this. I’m also wondering what games this might work best with.