Just a Small Tweak to Ashe's Kit to make her viable
Frost Shot deals bonus damage. Physical or Magical. Take your pick. 8/16/24/32/40 bonus damage.(perhaps alter these numbers, 40 bonus damage is a lot. But 8 seems like a good starting number.) Keep the slow the same. Increase the mana cost maybe.
There. Much better adc. Since she doesnt have an escape, damage or utility pre-6, she should be given damage. Just like the other adcs. Please. Ashe has so much potential. Let her have one more damaging ability