Can we talk Kennen

-
Extremely low base damage with horrible ability power ratios. No free damage of any kind (like percent health etc).
-
Only a half duration stun (1 second), compared to other mages that usually can stun for 2 seconds.
-
Extremely energy dependent with very poor energy recover mechanics.
-
Extremely easy to counter his ult (example one Janna tornado is enough).
-
Relatively long cooldowns, especially on ultimate.
-
Almost no updates over the years other than unwarranted nerf to his range.
-
Most mage items have mana which he can't use, which severely limits what he can build or he has to waste gold on useless stats.
To be honest, this champion could use a total rework. He just can't offer much because so many other champions are just way better.
But if working with what he has now, he needs a little bit of everything. All his stats, range, damage, ratios, move speed, all could use a small increase.
Have you noticed that this champion is almost never played? That means that only people that know how to use him ever touch him. Which also means that his win rate will not be dragged down by the first-timers.
This champion needs some buffs all around to make him competitive. Right now he is just weak.

and
.
plus all attack speed, he can stun lock any champion. It doesn't matter how little damage he does, he can win any fight, end game, with enough attack speed.