Can we remove the duration mechanic on Xerath's stun?

He's frustrating to play now that every mid laner has built in anti-skill shot spells. And to land the E at max length (where it's actually worth a damn) is even more of a "fuck you" to Xerath.

And personally I'd like to at least make assassins blow a flash or their OTHER gap closer spell when they all in you for the ez pz kill.