Ashe should be focused on utility
My original post was filled with flaws. So I am going to try again.
Ashe as a champion is really awesome. But currently broken. But I don't think it's any mystery why she is broken. When Ashe had no damage steroids, except her early game harass on her passive. She was still considered a good ADC. She just focused on utility instead of damage. She is still the highest utility ADC in the game, with global vision, a perma slow, a stun and good harass. But her new Q is the problem. Since it's release she has been on an off broken or worthless. The idea of giving Ashe a steroid comparable to a hypercarry like Tristana, Kog'Maw. A Damage steroid comparable to Draven. Is absurd. On top of that, the damage steroid they gave Ashe does not fit her thematically. She is a ranger, with global threat, precise strikes and useful tools for her team. Her new Q, turns her into a machine gun turret.
I have no direct suggestion, as everyone is obsessed with her new Q just because it looks cool with runaan's and pushes towers. Though honestly, being a machine gun tower destroyer is Kog'Maw, Tristana and Jinx's job. But if I were in control, I would rework her Q into something less broken, that provides her with either a cool utility, something ice based or precision strike tool. Something that fits her theme more and will allow her to stay strong, instead of bouncing between useless and OP.
EDIT:
It terms of Thematics. This is always what I imagine when I see an archer
http://img.wallpaperfolder.com/f/6B717F4291DD/archer-men-warrior-green-arrow.jpg
That whole robin hood feeling of precise, penetrating arrows, striking the enemy often from surprises.
Not...
http://67.media.tumblr.com/871f2314f11beb9f0cc9a9e90be4f978/tumblr_inline_nz690hobRy1r8c6s8_500.jpg