If we limit mod motors then people will use more boost. So boost might get banned too, then people will try to find more power by using the battery of the month and/or motor of the month ! Tech would be more difficult too. Sound familiar
Mod is a great refuge from the problems of "spec / stock" racing because most of the complexity and cost of finding the best electronics is removed by not capping the motor wind.
IMHO, The only thing that separates a competitor in mod is their driving ability and restraint with the trigger finger. If we could all sit in the cars we would have a natural ability ( aka : survival instincts ) that would stop us from over using the throttle.
IMHO, The only negative to Mod is the cost of tires. If there is anything that needs a rule overhaul its the tires / wheels / specifications of them.
Jake D.