eh true enough with the wings, though in bleach they do seam to make some kind of a difference between walking (and fighting) in the air, and actually 'flying' (like when yoruichi used that artifact to save Ichigo, and Ichigo used a similar one to save rukia.... I donno I am just reaching)

Other then that, guess its just his 'previous Hollow form'... I mean Grimmjow's ears and tail really weren't of any use either... besides making him a furry lol.

Anyways yah, slow chap... I wanna see some action...

~David