Kennen, the liability
is under powered and here's why:
- he does not scale at all.
If the other team is even slightly tanky, you can ignore the kennen completely. I have seen many players run TOWARDS the kennen ult, rather than away because they know they can easily tank it's pathetic damage and just kill him.
- He runs out of energy too quickly and has the worst energy recovery in the game
Of all the energy champs, kennen has the worst energy recovery of them all BY FAR. He does one spell combo, then he becomes useless, which means he has zero sustained damage.
- on top of the above two main issues, he also has some small annoyances such as
a) lightning rush only does half damage to minions - there is no need for this handicap b) his auto attack animation is slow, which makes it much harder to last hit compared to other champs c) the early levels of his shuriken have a long cooldown, which make it a poor farming tool in lanes that he gets bullied and needs to stay back and play safe
Kennen shines like a rock star in exactly ONE type of situation: when the enemy team is extremely squishy and has hardly any crowd control. But in a real game, a competitive game, that of course never happens.
I suggest trading the armor and magic resist on his lightning rush (which are useless anyway) for more damage and better energy recovery at the very least.