@Meddler please don't buff Kassadin's basic abilities.
I was linked a totally out of context screenshot of a post with you saying that Kass is getting buffs so I'm believing it and I'd just like to say that you really shouldn't buff his basic abilities.
Aside from the fact that I, as a Kass player, am very attached to his ult being powerful, compensation buffs to anything other than his ult will only serve to lower his skillcap, and compensation buffs to his ult without the range will be largely ineffective.
If you remove the reliance on landing his ult, you are effectively just solidifying it as a purposeless blink which he uses only to get around and beat people up. If he is able to kill somebody effortlessly with his EAAWQ then he is a problem. Landing his ult, although not particularly difficult, should be a key part to playing Kass. His Q/E should probably be a relatively low amount of his damage since they are ranged. He should be forced into melee if you guys insist on keeping his burst patterns, and a buff to anything other than his ult won't help with that.
As for buffing the damage of his ult, that won't really help because he won't have to range to get to it.
If you guys are REALLY intent on giving him some more power but keeping him nerfed, I propose giving him back his ult range and then nerfing his Q or E damage.
If he needs compensation, buff his W/R, because they are the healthiest parts of his kit for applying damage even if they have the most power budget of his kit.
I think the final solution is to make him into a DPS champion, probably through his W/R (think of his ult as being used to move into range for his W and then using the stacking effect to slowly ramp up his DPS) and then his Q should definitely be changed into something else while his E can probably stay the same. The combination of Q/E being a large part of his burst makes him a bit faceroll though.
as an aside, but what do you think of the idea of Qs cool down resetting upon champion kill? I think it would fit his theme of killing stuff and getting benefits. I mean how many other characters have a resetting damage move? Just think of it like in those movies where the archer character (orlando bloom i guess) is just firing arrows rapid fire and killing targets, "headshot" style. I don't think it would push him over the edge, it would just better fit his position as a carry that kills things (making his passive more useful). It would make him feel better because currently if you score a long range kill with Q, his attack speed buff isn't all that useful for skirmishes.
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