Ashe's passive goes fundamentally against the role of an ADC: Rewards for NOT attacking?
Focus is a passive that should be on an assassin, not a carry. Assassins are opportunists, waiting for the right moment to strike and then insta-killing the target. But tell me, when can Ashe ever instantly 100-0 someone? The answer is a big fat NEVER.
Unfortunately, Riot seems to have some screwed-up logic when it comes to her passive, thinking "it's fine, no complaining allowed!" when everyone and their grandparents agree it is NOT fine. It is flawed. Horribly.
Riot, what do you plan to do about this? Continue to play ignorant, or maybe bite the bullet for once and do something productive?