Making Kassadin a Stronger and more Solid Champion

I think we should nerf Kassadin and make him a more stronger and a more solid champion. This is because Kassadin is a melee but his abilities scale with Ability Power, Kassadin can really only attack and do damage when he is level 6 when he has ult. Kassadin's Q send out a Null Sphere which really does no damage but it does give you a little magic shield, His W is ok but below decent, I like how it has no mana cost and it restores mana but, you can't really land this attack unless you have your ult, if you try to land it without your ult, you might just be taking more damage from the enemy if champion is a range or he is ad(Melee) since kassadin is melee and still is ap even though melee should be ad. E (Force Pulse) just takes to long and if you don't have it kassadin combo with the ult just does no damage. Overall kassadin really has no good damage,stun/slow, and abilities, And I think this is why people rarely play kassadin. I'm a person who still plays Kassadin but, I feel like i'm drifting away from him. ( I'm not talking about a small nerf/update for him i'm talking about a BIG update for him changing his abilities except his ult)