I hope you don't mind edits, 'cause I'm better at them than explaining. This one is mainly based on other people's crits anyway, so I take no credit for the changes:

She still looks a bit cuter than sexy. Maybe because her looks seems soft as compared to like, harder, amybe more... feline for lack of a better word. Sharper eyes, longer limbs, slimmer, sleeker, that kind of thing. "Sexy" to me is a little more, again for lack of a better word, intimidating maybe? Powerful? Heh, riiight...
Anyway, cool stuff. The improvement over the original is completely amazing, so keep it up. It's coming along very nicely.