Possible way to fix W?

Thoughts on making his W stun trigger more quickly if the target is already slowed/cc'd? That would make it more useful both as follow up with teammates and solo with W evolve.

For example, after W evolve, you can slow the target with E, and then place W on them, and they'd be stunned after 1s instead of having to wait a full 1.5s to be stunned.