I wonder if Riot has ever considered giving Corki a simple sweet-spot mechanic on Phosphorus Bomb.

I feel as though a lot of balance decisions when it comes to Corki have revolved around the power of Corki's Q. Damage, Scaling, Mana Costs. The Ability even got changed from originating at a target location, to being a Missile.

It could so easily be changed to having a few sections with varying damage percentages.

E.g. Centre - 150% Total Damage Inner Ring - 100% Total Damage Outer Ring - 50% Total Damage