Ashe is a really good champion, but she lacks that finishing touch that everyone craves. This crave is her ultimate. Right now Ashe's ultimate is magic damage while you build her Attack Damage, if Ashe's ultimate was attack damage she would finally be able to duel with other attack power champions like Draven, Varus, Jinx, Graves etc.
Thanks, SaintPlaysLeague
Ashe's ultimate is probably the most balanced aspect of her kit. With 600 base damage and the longest potential stun in the game, it really doesn't need AD scaling.
I'd rather see changes to Ashe's passive and Q to make her more of a threat if she can keep applying Frost Shot to the same target. Eg.
Frost Shot (New Passive): Ashe enchants her basic attacks with ice, applying a stack of Frost Shot whenever she attacks an enemy unit or hits them with Volley. Each stack of Frost Shot after the first slows for 5% for 4 seconds, stacking up to 4/5/6/7/8 times (increases at levels 3, 6, 9, 12). Each stack of Frost Shot causes the target to take 1.25% extra damage from Ashe's auto attacks. (Note: Max slow is unchanged from her current Frost Shot)
Piercing Arrow (New Q): Ashe's next attack deals bonus physical damage equal to 10/20/30/40/50 + 5/10/15/20/25(+.025 bonus AD) per stack of Frost Shot on the target and marks them. If the target had at least 4 stacks of Frost Shot, they are also snared for 0.75 seconds. Piercing Arrow does not activate on marked targets. Marks last for 8/7.5/7/6.5/6 seconds.
Cost: 15 mana Static Cooldown (unaffected by CDR): 0.5 seconds
There'd have to be some number tests/changes across her kit but something like this could easily add additional gameplay to Ashe, buff her damage output through prolonged auto-attacks instead of instant satisfactory burst, while also adding some counterplay to her current permaslow arrows (first arrow doesn't slow, and the slows aren't as powerful at first). I took the idea of a snare from someone in this thread, but the idea itself could also help in further defining Ashe's niche as a utility based carry.
What she needs is higher base movement speed. She's far too slow to be viable in the current game setup.
I've long said that her ultimate should have single target damage that scales off of AD, and that the area damage and slow duration should scale off of AP.
I also think her E should 'mark' enemies it spots, enhancing Ashe's attacks against them in some way (bonus movement speed when attacking marks or moving towards marks, slightly more damage with her auto-attacks, or... something), and preventing them from disappearing in the brush or going stealthed while they are marked for a short duration.
Finally, her passive is kinda wierd. An ADC is meant to attack alot, yet her passive only rewards her for NOT attacking. I'd rather her have a flat bonus crit chance (scale it with level), and have her passive also add some frost-themed benefit to her critical hits. Not slow, as we've already got that from her Q. I honestly would like to see a very breif duration snare. That would interrupt some dashes and other mobility powers, and would also support her ability to kite, which seems to be the one thing she's meant to do better than any other champion.
Ok in my opinion she does need a buff but not a big one. All I would like to see is A) Her Q now does X amount of dmg while toggled. This would be magic dmg and would increase per level. I think this could be like Jinx's Q rockets. Just in terms of dealing dmg that is. OR B) Make it that her E adds either a frost that slows, or add it that it puts a stack on targets in the explosion radius. When a target is hit with the stack on them it stuns for .5/1/1.5 secs. I think these would be small buffs that would overhaul her a ton especially since I don't think she should be a high mobility archer but rather a archer that slows people down to her speed. Seeing that she is supposed to be about the cold and frost.
Aside from Fiora she has the second shittiest passive in the game...
JUST BUILD AP IF YOU LIKE HER ULT... 
kick in da bumhole
Not only she needs buffs/reworks on her skills, tweaks on her stats and auto attack motion must be fixed. Right now, without AS runes applied, its really hard to farm properly, hindering benifits from E's passive. This also give her disadvantage that Ashe's pretty difficult to earn some kills due to her weak power, hard to earn some handful of gold.
Ashe already has so much power centered on her arrow, it's basically half the reason she's kept so weak (the other half being her permaslow/kiting). Don't touch my favorite champion, I don't need her riding the roller coaster that is Riot Balance along with all the other AD's.
If nothing else, I would just really like to see her with a better passive that would be more useful, and not be against her role.
The crit's mostly going to build up when you're walking to lane and first thing you do when you get back... decent chance it'll be attacking a minion. Also if you do go to build crit it makes her passive unnecessary.
She's gonna need more than a buff on a 1 minute CD (at level 18). She's gonna need at least one more damage ability in her kit to be safe from gap closers. As well as a buffed passive.
