Whenever I play Ashe I feel like her auto attacks casting time are clunky; it happens that I cancel my AA because the animation is very slow, even with high AS, unlike champions like Lucian's that are almost instant.
Thoughts ?
Practice makes perfect. Try last hitting with Vlad or Cassiopia...that's always fun.
I personally think it's fine.
The muscle memory of using other champions auto attack animation may stick for a while and you have to adjust yourself when fiddling with champions whose auto attack ramp up is different.
and 
come to mind, whose auto attack animations have a different feel to them.
