Talk:Ashe/@comment-23838403-20140714070742/@comment-4952847-20140715152330

It used to be that Ashe would only crit once after she leaves base. They modified it so that during the laning phase where ADCs are not attacking minions all the time, Ashe can charge up her passive really easily. To be able to hold onto the crit also means you can pick when the enemies are out of position to harass for almost a guaranteed winning trade.

As the game moves on to later stages the passive loses its uses, sure, but for laning and harassing it is a very strong tool. Also it wouldn't make much of a difference if it would charge in combat, because most of your time is spent waiting for minions to reach low health.