I feel like kassadin is still pick or ban champion.
Even after - 5ms which made him unplayable, Kassadin still is somehow solid pick on soloQ, and it's often banned or picked, how ?
His main problem (except his op late game, or welp he is quite good even after 6), how efficient he is vs other ap. Good kassadin will just win the game in lobby, unless he is a total idiot that will feed early, but even if he survives to late game he still will be problematic. To shut him down at 16 lvl u need to chain cc him with at least 3 champions, so after zhnoya he won't use his 2s r and flash.
I think his passive and 16 lvl R should be nerfed, he can get a bit of armor in exchange for nerfing his passive.
What do u think about current state of kass and what changes should he get?