What if crit late game adcs worked like kassadin?

Weak early, loses lanes to almost everything but IF somehow you manage to win lane or something with them they go off and start snowballing into oblivion.

Give crit adcs some kind of crazy scaling aspect on their kits to further make the "Late game fantasy" true, like for example its when he hits lvl 16 and gets his rank 3 he basically goes off.

What if rockets attack speed penalty slowly got reduced with champ levels up to lvl 16, and at lvl 16 it unlocks, the rocket mana cost halves (down to 10 mana per each) and the -25% total as penalty completely goes away.

So if jinx somehow snowballs early on OR holds the game long enough until lvl 16 you have a real win condition on your team, similar how kass works? I just feel like theres almost no reward for winning lane as a bad adc laner right now, so theres no reason to play them over lucian/mf/jhin and the likes, or just of course play a mage and do everything late game crit adc does, but better.

I think it would be nice if they did that to late game adcs instead of just making their lane better.