The limits being 2x2 or 5000grs have been driving the technology, no one would guess we could have what we have these days back when Hanno made the proposal, batteries are getting lighter because of the 5000gr on F3A batt types same with motors, look at the weight vs power nowadays, and the YS are getting more displacement too on the same weight, increasing the limits will not change anything but it will render the high end equipment useless as the manufacturers will take advantage to it, and this very same argument will repeat itself again in the future.