I think the cloth should have a bit more spec than the fur. I've never seen light catch a rabbit's fur, but i've certainly seen specular on more canvasy fabric. Your spec has a ton of good detail but i dont think there's a strong enough material definition. The leather definitely needs brightening up -- it's getting lost in the noise of its detailing, even the darkest/most worn parts of it should be lighter on your spec map than the fur.
On the diffuse, in the end this is a matter of style, but i'd like to see some sharper details on the cloth and musclature creased in a bit. I know realistically speaking the fur would obscure this but leaning torward a more manga/comic stylization (because, i mean, ninja rabbits) might be a good idea; quick paintover for the kind of thing i mean.
Shaping up awesome, though!