An idea for a tweek to crit chance

I read up on Riot's opinion on randomness in their games and how they are thinking about looking at crit-chance since it is a random variable that have no counter play to it.

My idea is this. What if the crit chance determines weather or not a basic attack is a crit BEFORE they signal the attack? Instead of the adc autoattacking a target, the game registering the hit, and then a program determining if the attack is a crit or not, how about the program determines if the next auto attack is a crit right after they are done with their previous auto attack.

Add a unique glow to their hands or maybe their weapon to signify that their next auto will crit. This allows ADC's to start a fight or try to poke at their laners because they know that the next auto attack will crit. It allows enemy teams to react/respond to it because they know that the incoming attack will be a crit.