Zliean Too OP in One For All

I just played a game of one for all against a Zilean. Don't get me wrong, I would've loved to be on that team for the simple reason, perma stun. You get hit by one bomb and then all of a sudden you have 8 others on you and you can't move. It's not balanced at all and I really find it hard to believe others haven't been upset by this. Please do something about the champion in that game mode.