Bring Ashe into 2015
I have 2 ideas that, I feel, would bring Ashe up on par with 2015 standards.
1: A simple thing, should be done regardless, is to make Ashe's Arrow Volley to indicate each arrows path (like Kha'zix tri-shot), rather than the full cone it shows. For new players seeing how the aoe works are frequently mislead by the arrows passing either side of an enemy.
2: Make some interaction with her Q and E. I think that if Q is active and you fire off E, it applies an aoe slow field at the location it reveals.
Those are my thoughts anyway.
Oh, also Woad Ashe skin in-game. Her hair would look better if it was more like the splash. A dark brown rather than jet black.