Please mod this game. Coins and bucks seem to be saved on server so I'm not sure how effective modding that part will be.
But, I am assuming modding for a long line, or at best a complete ball path line even after deflection off walls would be really awesome. Obviously, the physics of how the ball moves after being hit or deflects off walls or other team members is hardcoded into original game, so if anyone could make it such that a visible line appears for its path taken after being hit would be the greatest mod for this game :)