So what about just removing the true damage from Master Yi?
Ever since the sate devourer meta has come out Master Yi has basically been at the top of it because he's capable of outputting an obscene amount of true damage in a matter of a couple of seconds all the while still dealing loads of physical as well as magical.
Riot agreed that he needed a nerf so they smacked him with the nerf hammer and dropped the base damage on his E and upped the scaling to prevent people from just building outright tank after Devourer and rageblade. After the nerfs people are new building straight bruiser yi by combining thinks like Steraks, Maw, and mercurial to still retain extreme durability while also retaining AD to go along with his E passive.
As alot of people know there are tons of items that riot has found hard to balance in the past and instead of reworking it they outright deleted them. So why not delete his E? He should still retain some sort of on hit as that's what his kit is designed for but true damage as an on hit stat is just too strong and difficult to balance.
If you nerf items because of a champion then other champions are affected as well. If you tweak the ability like they did to make it scaling based then people just change the build. If you gut the ability you gut the champion in some cases.
He won't become any weaker than he is now after sated is removed because the root problem of the Double on hit passive from the item will still exist in the new rageblade and with a new % HP physical damage passive from the new jungle item he might even become stronger.
So I ask why not just remove the true damage and rework the ability? Even if a botched rework potentially cripples him then it doesn't really matter as there are still dozens of champions that crashed out of the meta and are rotting away so him taking a time out from the meta's spotlight wouldn't exactly hurt.