Replace Creep Block
Give minions an aura that slows champions when they pass thru. It allows for the same mechanics you can currently have (target enemies restricted by creep proximity), but you have a more acceptable pathing system because you arent fucked by a minion that randomly moves. Its unacceptable that your champion can wind up doing pirouettes because minions are so fucking derpy next to impassible terrain.
Original post edited for marketing purposes.