@Meddler, A conceptual question
Thought for an adc champion, with unique auto attack mechanics. But the question is: can this be implemented, or would it hinder game health? The champion would attack, and after a fairly long delay, the missile would start flying. It could be a sort of lock-on mechanic, where you have to input an attack, and "queue" the attack on an enemy, which sends the actual attack after them. Could be interesting to see in some iteration or another. (and yes, with sufficient attack speed, you'd be able to just have an army of missiles collapse on someone)