Kennen really needs his damage brought up to be playable in this meta

Sustained AoE damage does not work in a meta where everyone is bursting each other from 100 to 0 in 1-2 seconds.

Even when I'm fed as Kennen, I'm significantly less impactful than an equally fed champion with higher burst damage, even though I'm ending the game with a high amount of damage done to champions.

Taking 50-70% of two carries' health in a combo doesn't matter; after I've thrown out my combo, I'm done and there's very little more I can do to contribute (and I'm also likely going to die immediately out of Zhonya), and the two carries are still in the fight albeit at low health. Erasing one of the carries would have been more beneficial than just damaging two.

This isn't even considering how insanely hard it is to get good ults off when half of the enemy team can almost one shot you. Even with Flash up, you're hard pressed to get on top of a carry and have enough time to Q + W off before losing 80% of your health.

He really needs to be brought up to speed with the current state of the game.