How to REALLY fix Taliyah's W.
Riot, the vector cast is fine. I like it.
BUT
You need to add an outline of where the ability will come from.
https://i.ytimg.com/vi/ScQwS0UCetk/maxresdefault.jpg
This is how it was before, and after you would aim it. The indicator needs to be like this, but with the arrow you want going in the direction you want it to go towards.
Then, her W will be actually easier to hit the way Riot wants it.