Tahm Kench's W.

Needs to not work on allies anymore.

I don't care what kind of plays you can make with it, I don't care who appreciates it as a skill or how great an idea it can be theoretically.

I just got trolled by some asshat who decided he wanted to just eat me and spit me out into the enemy team every chance he got.

You should absolutely, under no circumstances, give any player control of another player's character.