Another idea for critics mechanic

Just a crazy idea I just had.

Critics are supposed to be the main stat because of which ADCs should outdamage the other champions, a stat adquired in lategame that scales with AD and AS somehow. The concept of and ADC should be the paradigm of DPS without burst, and the current mechanic of critical hits gives them a random burst, a burst that even in early game scales well enough to become a viable option, and better the in late game. All because critics are a fixed amount of damage that happens based in a possibility of apear.

What if the % of chance of critic meant, instead, the % of additional damage based on your AD that your aa scales with every attack in, let's say, 2-3 seconds? Like the heating of a gatling: at first you shoot slow, later insanely quickly (but instead of speed, the analogy here is hitting normal at the begining and ending hitting like a truck).

This would mean that the dmg would be more constant and, imo, more fair. The counterplay to an adc would be killing him before he "heats up", not killing him before a random lucky hit oneshots you, even at early lvls.

Opinions?

PD: Sorry for my poor english, I hope you could understand well.