Ashe being a utility carry makes here late game a bit meh.
I mean she has no escape. So if she is farming a pushed top wave near her base and someone fed shows up, shes dead almost instantly if he has no arrow. Her slow is very unreliable late game as it barely slows. The arrow is quite useful, but at short range its very meh since it doesn't do any damage its really just use for stun which is not that great... Ashe's volley late game isn't useful, I mean it does apply frost shot which is nice so you can get 5 stacks quickly, but its damage is not good at all. Finally, Ashe's Q is her best ability, but at an 18 second cooldown it's only useful once in a team fight and then you have to wait 18 seconds and it's not helpful at all.
Tl;DR The ashe update was amazing. She is a really fun old timer champion, however she could use some tweaks to her damage, cooldowns, and late game. Thanks!