@Riot: If you want to rework Aatrox, give him Sion's old ult.
"Grants Sion 50 / 75 / 100 % lifesteal and 50% attack speed for 20 seconds. Additionally, Sion's attacks heal surrounding allies for 25 / 37.5 / 50 % of damage dealt."
It's not exactly original, but remember how the community wanted Aatrox to be kind of like an AD support that would cause his team to keep fighting when he was in the middle of the fray?
Well, nothing says "Keep fighting no matter what" like having Aatrox spreading the love of bloodshed to his team.