So for the question of what i do. Im the Animation Director at Riot. That means, I make animations and deal with art!!!
The question of the cool run was on purpose. If you get haste with movement speed, you get the awesome ninja run. I never get flash on zed, Ghost is awesome on him bc u can spool it up during your ult, W, then you have escaped!!!
I feel he has a higher skill cap, and is a little challenging, but if you master it, you will cause havoc on teams...He is a farming machine and can push lanes and roam like a beast. That is the main thing I love about him.
I am no pro player...even at almost 2000 games, i am def. not a pro, and so some of the more hardcore people will have different feelings. Good thing i make art and aren't in charge of those technical calls!
Zed is the Ultimate Ninja awesome sauce at least for me!