Let me turn the question around, 'what are you not happy with here?'.
Each of us has certain concepts that we work with. They are 'our guidelines'. I don't kinow what yours are but I know mine. The model is in the middle of a great expanse of white but she is in lingerie. Does that make sense? Perhaps if it was a catalogue image but in all other glamour concepts, she should be in an environment that works with the 'mood' of lingerie. I could appreciate her totally nude in that pose more than in lingerie. Especially if in b&w. Hope I am making sense here. Your model has beauty, style and grace, carry all of that into an image that maximizes that. IMHO.
Mike