Wow, Kennen sure is a great champion

Aside from the part where he has no kill potential on anything at top lane, loses to almost everything in mid lane, and can't trade with most casters, leaving him no way to get fed enough to be a threat in the late game.

You know, assuming the enemy team has no way to disengage or CC you before you can get in ult range, and their carries have no mobility. Which is almost never the case.