Make Kassadin's Q an instant cast

There are 11 channeled abilities in the game that last long enough to interrupt. (without refunding the ability or reducing the cooldown)

Is a basic ability, and he'll generally have you feared during its duration so you won't get to interrupt it. 's can deal between 200-700 before the sphere from Kassadin's Q even reaches her, depending on where it's fired from. Are suppresses, so you can only disrupt them if you aren't the target. 's is a taunt, so you'll also be unable to cast your Q while inside it. Generally doesn't use his in the presence of an enemy anyway, so you would only be around at the end as opposed to when he's channeling. 's has the same general issue Kat's does. During the channel, if you're not right on top of him then you'll just take the damage from the charge during the flight of your Q. can't be targeted if he's casting his while dead. and Has already knocked back her targets by the time you cast your Q, though you can effectively stop the healing (also still heals the whole time your Q is traveling.

That leaves as the sole champion with an ability that Kassadin can effectively interrupt even if he's the target (which still has the same issues as Kat or Nunu, but can be dodged.)

If they aren't going to give Kassadin the full relaunch he needs (but Fuck, they sure relaunched Fiora for no reason), and if they aren't going to return the silence that actually made him an anti-mage, at least let him interrupt channeled abilities without waiting 2 seconds for the attack to land.