Kassadin needs help.
His pickrate is extremely low and his winrate dips into the 40% range in Plat+ sometimes.
His early is awful and although he's better late, it's still meh compared to any other meta midlaner (
).
He's a champion that needs to scale and when he does scale he reaches the same level as other midlaners who are decent all stages of the game. You're basically screwing over your own team for no reason when picking him cause your team won't have a midlaner for 30 minutes.
I feel like if his base damages are going to be rubbish, he could have slightly lower CD's. Change him into a mobile sustained DPS mage instead of a useless assassin.