These are all very good suggestions! Do take this to Yoshi! I especially like the idea of a knocking/pulling bow sound, and especially the arrow trails. I was just think this the other night.

I think if they made a new quiver per arrow type, that'd be perfect. That way, the rank 1 arrows have a cheap looking quiver, while the highest ranking arrows have a really fancy and well designed quiver.

Also, some boob physics certainly wouldn't hurt. As long as it's done tastefully. TERA online uses real dynamic soft body physics .. but looks completely unrealistic and is wayyy too overdone. Just something subtle would be fine.