Would It Be Cool If Taliyah's W Would Let Her CC Herself Like Ziggs?

She would literally become a yordle.

Idk if it would be broken but it would be cool.

And maybe it could give her a short burst of movement speed away from walls if she did it while surfing by a wall. I'd find that pretty awesome :)

Yeah let's make her completely ungsnkable

It would be. The entire point of her W being unusable on herself is to balance her and prevent her from having any sort of escape mechanism outside of her Q passive MS buff and her ultimate which can very easily be interrupted.