So I've been spam picking Aatrox, and here's what I have to say.
He's really good, but has some issues in his kit.
His ult does nothing, it's hardly an ability and the main reason I even cast it is for that 20% extra AD. You do nothing when you revive besides get insta killed immediately because you have no set up damage, which is what Aatrox's new kit is revolved around. It needs to do some AOE damage or something of that matter, because how it stands right now, is completely pointless. I don't feel like a "World Ender" with it at all.
His W is completely meh, and when I do end up bulling champions to the center of it, it just doesn't feel as rewarding as it should be. I end up killing champions without even using my W because of how well i've been landing my combo's with Tiamate. It either needs to do more damage, or should apply a heavy slow that rapidly decreases over time. Players are just walking right out of the ability without boots.
Other than that, well done Riot. I'm really enjoying this champion, he feels rewarding to play, offers great team fight potentional and has great aoe damage. Regarding all the whiny posts about "how you ruined aatrox", they havn't played enough of him. They're just complaining because they got shit on in lane and missed all their abilities.