One other thing that I have not mentioned is the potential damage to electronics (and vehicles) that has accompanied the introduction of the advanced timing options.
We have seen many more motors with the stator windings burnt and the rotors demagnetized from the improper use of the timing adjustments. Many beginning racers have neither the budget nor the patience to deal with this additional damage.
We changed our motor warranty policy to account for this new kind of damage. And, we designed our new motor so that both the stator and rotor could be replaced by the racer.