Which Championis the biggest "missed potential" for you? (Game Mechanics wise)

When i say Missed potential, i mean that the kit seems to have some cool ideas but it's usefulness doesn't live up to them.

For me it's Guurda Bogbrew, i think her passive & A3 are good and cool, but her A1 & A2 feels so damn awkward. I would love to see them buff her, and maybe redesign the A2 to make enemies current debuffs protected and simplify the A1 to a straight TM decrease.