hey O.o I read the thread and I must say that you being a diamond 1 player and using Kennen is really really awesome, also your proposed change for Q of removing his casting time would be great as well, he's supposed to be a lightning fast ninja it's silly that he takes time to throw a shuriken :P
I myself proposed a couple QoL changes a while ago but I got so tired of bumping the thread, then I made one in these boards and it got some attention but ended up being buried, plus the name for the board changed, also me using a smurf account might look bad in here but since my main is in LAN I have no choice :( oh well I'll leave the link here just in case you might wanna swing by (also, you did the same thing I did :P posted it on his wikia page xD): http://boards.na.leagueoflegends.com/en/c/gameplay-balance/a2og7rRs-once-again-qol-tweaks-for-kennen
In it you'll find that I feel that Kennen's power levels are ok but he's somewhat bugged and must be fixed