Aatrox Ult Lore-themed Rework
As it is, Aatrox's ult doesn't fit with his lore. So I came up with this so it'd better fit it.
According to the lore, Aatrox's appearance in the battle completely turned it around. He turned men who were on the verge of death, begging for mercy, into terrifying warriors.
So, here's my thought. A small rework to part of Aatrox's current ultimate.
Instead of a flat increase of attackspeed on himself, he and any allies in his AoE will gain a AS buff that scales with their % missing HP. This would better fit his lore, as well increase his usefulness and teamfighting, and give him a somewhat less binary usage for it as well.
The Lore I'm speaking of: http://leagueoflegends.wikia.com/wiki/An_Ancient_Mystery_In_Runeterra