Ashe in her current state in the Meta; How to Improve her...
Ashe is an adc with a lot of potential. Global engage. Slows on auto attacks. Very good at kiting. However, she lacks a gap closer to get into position for a kill and lacks and other hard cc pre-6...someone like jinx has a strong, long range slow along side a zoning root. Also, jinx's Zap does significant damage to that target hit. Ashe however, does not have a strong damaging ability in volley. Her passive is, well, not good. A passive that forces you not to auto attack to benefit from it seems to be the opposite of what an adc should be doing...I suggest changing a few things to make her be in a bit of a better spot.
A) You can change the ratios on some of her abilities. Apply a increase in ad ratio to her volley, or allow her frost shot to apply extra damage in addition to slow. (It does cost mana after all...and the slow isnt fantastic early on. Extra damage means it's worth putting points into and allows for new builds...like possible essence reaver ashe? sounds fun to me.) Also, you could add an AD ratio to her ultimate since she is a primarily ad champion...make her scale into late game with all her damage that she will likely be building.
B) Give her more mobility. Change her hawkshot to something a bit more like a rolling shot that shoots straight in the direction she moves in. This should reflect her 'northern hunter with a bow' theme as well. This would allow for Ashe to get into position more reliably and have an escape mechanism, which she direly needs before six. She isn't a safe pick and is easily ganked and bullied in lane because she isn't lucian or caitlyn or tristana or even vayne. All of them have gap closers.
C) Make her abilities scale more on crit, since that is what her passive does. Allow for her volley to crit as well, allow for her ultimate to crit...seems to make sense to me. Why limit this champion if you chose that passive for her which should be central to her kit? Crit seems to be a good idea to build on this champion and allows for her to control more effectively in lane(I would fear a critvolley if I were an enemy adc to an ashe...or a crit ulti followed up with anything.) If not a 'critical strike' some bonus damage would be nice on her other abilities since her passive makes her laning really bad and boring to be honest. It isn't useful throughout the game like other adc's abilities...
Welp, I hope some Riot staff member will see my argument here and take some of my ideas and put them into place! ^_^
has Valkyrie
has her net
has Stand Aside/Blood Rush (Weak, but there)
has Flame Chompers (Weak) and, if she kills someone, her passive
has dash-spam
can Vault
can go On the Hunt
has Rocket Jump
is
as being generally helpless when jumped on. But even then.