I feel if your lightinf had more contrast and cast more of the model in darkness, the composition would have benefited, or had her face been more evenly lit as there justs that upper left quadrant darkened. Of course, physics doesn't always play nice, and poses don't last forever. Speaking of which, the pose is great. It's so natural to the model, yet almost alien feeling. It feels... it's hard to explain, but the immediacy is well-captured here.