A slight change to Veigar's E could make him viable again

What if, instead of the current .75 second delay on Veigar's stun, Veigar channeled for .5 seconds and then instantly dropped his stun at the location of his mouse when his channel concluded.

I think this would fix the majority of the problems with Veigar right now. It would add a great deal of tactical counterplay (landing the stun becomes a game of skill and reaction between the Veigar and his target), but it would also return return precision to Veigar's kit, reward forthought and skill, and give him a way to adapt to situations more dynamically.

Thoughts?