Aatrox's Passive
His revive passive is often worthless. He comes back to life surrounded by enemies with a drained blood well and therefore no bonus attack speed, and often just gets killed.
Instead of a revive, just remove it completely and buff his ult or abilities, like have his ult be more powerful depending on how full his bloodwell is or something and give him slightly better stats and scaling to make up for him now having 1 life.