Lowering details on Ashe ultimate's arrow is in my oppinion a bad call from Riot's art department.
https://i.imgur.com/6xocUZK.png https://www.youtube.com/watch?v=750ttsQZQaI
Problem's with Ashe's R was always extremely obvious. Arrow proper was much smaller than the actual hitbox of the ability. Fixing that by making it bigger is definitely a good call.
HOWEVER, I DONT SEE HOW LOWERING DETAILS ON THE ARROW MAKES ANYTHING BETTER
While I agree that "old" arrow was kind of a jumbled mess of various ideas thrown together just for the sake of making it look cool, this new arrow looks like something a person on his/her first year of graphic design studies would staple make in half an hour in blender. This looks unprofessional at best and hobbyist at worst.
Most other effects are absolutely fine, no question about it, although I'm going to miss those cute sparkles that linger a while after Ashe's E. It's just that the model of her ult's arrow looks so damn bland and uninspired. I understand that it's important for all abilities to be clear to read but come on. On one hand you make arrow bigger and more readable but on the other hand you put those snowy fog sfx all over it, which kinda defeats the purpose.