One thing I will agree on is that Yi is a pub stomper(Albeit AD Yi shits on AP Yi in that respect); but one single stun or silence(What kind of teams do you play on that doesnt have CC) that interrupts Meditate will get you killed every time. He has one nuke on a 10 second CD(6 seconds with 40% CDR).
One other question I have for you is which lane do you go to?
Bottom lane? I could see pretty much any standard combo bottom beating a Yi/support.
Mid? You will lose to any decent AP mid simply because you will have to melee for last hits. If you alpha strike you will push the lane and with Surge/Ignite your only escape is your Ult(Which is on way too long of a CD). Not to mention pretty much every AP mid has one form of CC to get you out of meditate.
Top? I said this is probably viable so long as they dont have stun/silence. The only regular tops that dont have one would be Nasus and Trynd; which would still shit on AP yi once they get Wriggles.
Jungle? Exceptionally weak ganks, relatively slow clear time.
I dont know why you are trying to defend mediocrity. Like I said if you have fun playing it go for it. AP Yi can be viable but it would be subpar compared to pretty much any other AP in the game.
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