Master Yi is pretty bad. He doesn't last long enough, and Meditate doesn't help, since you just get stunned then demolished. He's so easy to counter.
His Wuju Style sucks too, and his double strike doesn't really make a difference if you get eaten alive by one stun and one Ability.
Maybe buff his Wuju Strike, so that it actually does something, or buff his Double Strike so it hits every five or six hits? Or maybe buff both of them, or just give him a cc with wuju?
Currently, I've seen some threads and tier lists, and he just sucks. His only real AD strength is that he can kill towers quick, but I've seen other assassin's kill towers really quick too. And Master Yi's skills don't fit well. His AP only makes him a better assassin, while making wuju strike a pain in the *** to even have, while AD, ranged mages one shot kill you, or you get eaten by anyone with decent armor. Even worse, some people can just run off after Alpha Strike, leaving you to just sit there and cry while meditating.
He's too easily countered, and his skills don't fit well together.
Wuju Style and Double Strike fit with AD, but Alpha Strike and Meditate fit with AP. Even if you use him AD, his Meditate won't even be viable anymore, and he'll get killed by people that have better sustainability. People can also just flash away from highlander, which really doesn't help. If all else fails, Stun, he's dead. It doesn't help that he's really reliant on teammates too, since you aren't always paired with the brightest teammates.
I don't mind him being able to hybrid, it's just, his gets killed too easy, and his abilities just suck.