People seem to forget that Aatrox is on the rework list and what we got is pure luxury.
The balance team has LOADS of shit to worry about and to keep in check, after the mess that the other dev teams have left them with after this preseason, I think they did a great job at fixing most of the problems - and they're still on it!
Considering all that, the Aatrox, Cho and other mini-reworks, changes and buffs they all get even though nothing is planned for them since they're on the rework list, is just a bonus on top of that. Think about it - someone at the Balance Team actually delibaretly took the time to do extra work besides actually balancing the game just so that the Aatrox and Cho mains don't get left in the dust.
And even if the changes turn out to be not that good, I'm sure that they will take time to fix it over the next few patches ( like the Cho buffs currently on the PBE and maybe some changes to Aatrox if he really turns out to be that bad ) and if that's not enough - they will get a rework anyway! It was already announced that Cho is on the VGU list and that Aatrox will be part of the diver class update that will most likely happen next pre-season.
For now, be thankful for what we got and don't make premature statements and most importantly: be patient.