Batgirl from the neck down is the bomb! The mask and that face do not look like they belong as part of the same model. Her face is rather doll like. I would like to see you move it more towards human... like you did with SuperG.
Supergirl's face is brilliant. She has nearly the opposite issue that Batgirl has... Her costume needs more... it's mostly just flat colors.. how about a texture that makes it look like cloth? Or even some seams, and wrinkles...
I do like where you are going though