I know this has been mentioned before, but I was thinking about limited energy in time trials. So, when you start out on a time trial your shield energy is exactly what your enegy is on any given race, thus controlling the number of BR's possible, finding better lines through side shifting, and so forth. The catch being whenever a perfect lap is done any energy spent on BR's is replenished at the beginning of the new lap. Kind of a page out of the Eliminator mode from Pulse. Or only a specific amount of shielding is rewarded for said perfect laps, and so forth...

I'd like to know what others think on this, as it may be not all that great of an idea