What do you guys think of a change/revert to Katarina's W

I love playing Kat, but i feel like her W is so useless. I think reverting it back to Killer Instinct is not that bad of an idea, you would get a special effect on q and e, but sacrifice movement speed and a dagger, so its not like she becomes too strong. I don't really know how they would add that back to her current kit, but it would be interesting.

A different approach would be adding something to her w, like adding ghosting while you having the movement speed. It's decaying and doesn't last long so it might be ok to add this.

I just want her W to feel less underwhelming, but any change would do fine.

What do you guys think?