Yeah, the feet in the back are a nice touch. The curve of her spine on the one on the left is a beautiful moment. The posture of the middle figure is a little awkward. I have trouble making sense of what she's doing. Is she crouching, poised about to take off for flight? If so I think this could be strengthened. Maybe find a model or a photograph of someone in this position if you haven't all ready next time you try a similar pose. It's not an easy one to capture.