Master Yi could use some sort of anti-CC effect on his meditate
Master Yi is one of the champs has been getting screwed over with the stun bot champ designs recently and I think its only fair to give him some counter measure against all this CC. Giving him anti-CC on his W would help him against champs he struggles against without making him even more powerful against CC-less champs that he dominates.
I'm not really sure what be best to him give at this point and I'll leave that for you guys to discuss. Could be a cleanse effect when he starts meditating, a one time spell block, etc.