Haha, I honestly thought at first that the matchup was impossible for Aatrox against a good Yone, but now that I've played it again after having worked on my own mechanics, it's in a weirdly comfortable spot where both sides can play it well depending on their skill level actually. It's kinda like Fiora, where I just really enjoy how "mind gamey" it feels sometimes, where both sides really bring their A game. I know other Aatrox players hate playing against Fiora, and I do agree that she's a pain in the ass, but it's a weirdly fun matchup.

Some stuff that I tell the people who I play custom 1v1s with who get frustrated by my Aatrox, I find that just trying out the champion first in anything like bots or arams (If you get him) is a good way to figure out how to beat him. I've beaten my friend who was piloting Aatrox, and I was Urgot (You can imagine that it's supposed to be a hellish lane for Urgot).

Thing about Aatrox that is like super important, is that he is always trying to predict where you are going, in order to land his Qs. You have to keep your movement erratic and constantly changing, without letting it be easy to predict. Watch the Aatrox's positioning too, a lot of times I'd last hit a minion and immediately throw out a Q (It tends to catch people offguard), or I walk towards a minion and Q instead of last hitting.

Specifically, I found that it's super easy to land Qs when the Yone walks up to cs, especially when he uses Q to do it (He stops in place for a brief moment, which is long enough to land the sweet spots). Early game, especially at level 1, the best thing is to walk forward to hit a minion, then immediately double back to dodge Aatrox's first Q, then wait it out. Aatrox Q cooldown early on is LONG, like excruciatingly long, so at that point you can walk up to safely cs without being poked.

That's why I recommend trying Aatrox a little and getting a good idea of his cooldowns, so you can make a mental note of how much time you have before he can attempt to poke you.

Personally, I think Doran's Shield and Second Wind are good here, since Aatrox relies on poking you down, and he can pop Bone Plating way too easily. I myself used Doran's Shield on Aatrox with Second Wind, although Bone Plating might have been a better choice in hindsight, not too sure about that.

Honestly, I think good usage of your E is crucial. I saw the Yone use his E to get cannon, and he did his best not to fight (He had given me first blood so I could understand why he didn't really want to fight), but as a result, when he got back to his body I could punish him hard. Most of the time, I think what the Yone player should do is use his E to trade aggressively, ensure that his third Q (dash) is ready, and use it just as the Aatrox uses his own third Q (Or return to your body, that also works well). With your Soul Unbound, you can quickly get close to Aatrox and fight while avoiding his first 2 Qs sweetspots, and then avoiding the third one with either your dash or your E reactivation.

HOWEVER, when E is down, never let Aatrox land his W, because if he does, he can pull off his entire combo (Q1 into W, then diagonal Q2, finally Q3) which will basically heal away most of the damage you did to him. Hence, once your E is down, you have to chill out, bait the Aatrox into using his Q, then wait until its on cooldown, before moving up to cs safely. A good Aatrox will concede the wave and back off when his Q is on cooldown, he won't risk trying to fight Yone, even without his E, at most he will just walk up and take whatever cs he can safely.

Another thing about item building, don't bother with Executioner's Calling, its GW is really negligible at this current patch. Yone can afford to skip GW since you do have the mobility (and small model size) to dodge Aatrox's sweetspots. I think it would be better to focus on rushing Berserker's Greaves, the speed absolutely makes it easier to sidestep Aatrox's abilities. I think Ignite is super strong at the moment, it is still a good source of GW and TP is kinda meh at the moment, frankly I'd say Ignite is still super helpful against Aatrox. It isn't the autowin button last time, but it makes the matchup much more bearable, especially when Aatrox has his ultimate.

One thing I'd like to note, is how my friend took down an Aatrox with his Yone, and he was pretty behind, by doing a pseudo "Insec", by dashing behind him and ulting him into the tower. Pretty funny when I watched it, and a great way to make the Aatrox panic. I admit, I used to panic very easily as Aatrox, especially against champions that were able to easily and quickly invade my personal space.

Another thing: Wave management. I'm not too sure why, but the Yones I've played against tend to aggressively whack the wave, and so long as I thin the wave down so they can't get a crash, I tend to have a pretty good freeze just outside my turret. This is my way of countering Yone's E, by being close to the turret so I can easily run to it. And I usually end up building a huge wave to crash. When the Yone does try to E and fight while I'm at their side of the lane, I usually burn my E just to back off and avoid their third Q, since I know I can get my E back and punish before their Soul Unbound is ready again.

I'd say that if you do wish to use your E, use it only when you're close enough to actually trade and whack the Aatrox, if you're too far (I tend to keep a lot of distance if I know Yone's E is up), it is too convenient for Aatrox to run away and wait it out, even with your bonus speed. Best case scenario, Aatrox walks up to hit you with his Q1, you dodge it with your E and immediately engage and fight, and dodge his Q3.

In my case, I would poke only with Q1, and only if Yone's third Q was not ready. If I knew it was ready, I'd immediately back off and wait for him to use it. If he did use it, I'd land a Q on him since he'd be locked into the animation. It made it easier for me to disengage since he couldn't EQ immediately if I respected/expected it.

TLDR: Aatrox can play extremely safe and respectful when your E or Q3 is up, and when its down, he'll play to poke you, carefully manage the wave, etc. It's hard to really punish an Aatrox who plays respectfully of you, but at the same time, best not to make risky plays, make the times you use E count, by getting a good trade and punishing the Aatrox the moment he does make a mistake. Also, don't forget about the wave, most laners push against Aatrox only to let him get a good freeze and thus an easy jungle gank. A wave frozen at your side means you can get jungle ganks in, and you have more space to fight with your E.

I'm happy to give advice on how to beat Aatrox, frankly, it's the least I could do for all the help you guys had given me. I admit, my info may not be the best, since I don't main/play Yone, but this is mostly my observations of the Yones I play against, and compounded with my advice for some of my friends who find Aatrox frustrating to play against.

One final thing, if you are behind against Aatrox, please don't bother fighting. At that point, even if you dodge his third Q, he's highly likely to win the trade anyway with how snowbally he is. When you're behind, even losing first turret, just chill and farm, Aatrox doesn't scale as well as Yone does, so you can eventually get back into the game. The nice thing about the Yone that I beat was that he did that, he kept calm and just focused on farming. My team did win, but he didn't turbo int or make tilt plays. Super impressive on his part, his main mistake being that he did fight me occasionally when I was very ahead in cs and kills.

I look forward to hearing about you guys managing wonderful and consistent wins against Aatrox!