I completely agree. When I play Quinn (She's my favourite champ - I'd say I "main" her, probably) it's always very frustrating CSing - I almost always end up (in lanephase) with 5-10% less CS with her than other champs, and I'd say the animation is (likely) to blame (there are obvious other variables - my matchup, my personal alertness at the time, which item I started with, etc).
Additionally, I'd like Rito to do something (anything, tbh) with her Q - it's box doesn't seem 100% correct - I'd be happy with a width nerf and a slight length buff, even. Minions soak it frequently when it appears to be out of their range.
Also, the AA paired with Harrier doesn't always work like I wish it would. Oftentimes, if Valor marks a target when my AA is "en route" to that target, it won't consume it, and they get out of range (mostly in lanephase).
Lastly, and I know this would be up for debate, but I honestly think the CD on the active for her W could be slightly reduced for lower levels - it starts at 50 and scales down to 30. I'd be happy with it starting at 40 and scaling down to 30, or something. In those early levels, its active (for me, anyway) often goes unused because I say "Oh, I'll wait to use it when I go to ward river," then I end up deciding to wait to use it if I want to roam mid, or overextend, but then again, I'll opt to wait because "my ward is nearly expired." I understand that this is part of its cost, but I really think a slight adjustment could be made.
However, all this said, I doubt Riot will do anything since she hardly sees play :(