attack speed fighters still suck

Shyvanna is still fine, she's still good at doing what she does best, she just can't faceroll everything and everyone with AAs as soon as she gets 2 items now though. So if you think that "ruins" her then you were obviously dependent on a skilless OP champ and need to learn to play her while she's balanced.

Yi is.... getting better.... he's not in a great place right now but he still has that 1v5 penta possibility if played into the right comps cause of how stupid his kit is, so they can't really buff him too much or he'll once again go out of control, which is never a good thing for anyone.

Xin is a stat checker, the definition of stat checker, so if the current items are good on him he right clicks people and snowballs, but if they're not too great for him then he right clicks people and dies. The skilless fuck is only strong based on current itemizations, so he'll be back eventually, he always is.

Aatrox is just weak and has been for an extremely long time, 6.9 has very little to do with it, his first nerf 3-4 weeks after his release is where you should be looking really, and Riot has only given him these little minuscule buffs that barely do anything for him, so until they get their heads out of their asses and help the Darkin out he will remain weak. Metas and itemizations won't change that either.

So I half agree lol

and how will they be balanced without breaking them?

WhenXin and Yi are strong all games become less fun or interesting. There is nothing more boring than killing 3 enemies in a fight and then watching Yi come in from the jg and 1v3 your team and then dance.

Yi's Alpha strike bug is still not fixed, and 7 seconds ult is not enough.