I look at this photo and I'm not sure what story is it telling! On one side, we have a lot of dynamics going on; on the other side, we have a extremely static pose! The two, simply don't go along. In my opinion, a portrait should tell a story; not many stories. In my eyes, it should have been either one of two:
1. Static pose, static hair - in this case, light, pose, look (eyes) & view point - would have played a major role in the end result
2. Dynamic pose, diagonal composition - here, obviously the light, composition, view point, ... would have also played a major role; but the end-result would have defenitely been given by the dynamics
As it is now, 1st thing I asked myself was:
"What's with the hair; why is it in the air? She is standing still!"
I have seen photos with static pose and some dynamics introduced by the hair flying and stuff ... a lot of that in magazines - but, at least the model is looking in the viewer's eyes! And that makes a huge difference I think; it is far more engaging and ads dynamics to the whole!
I don't have your studio experience but, as you know, I love my portraits
- when I take one, 99% of the times I have the end result in my head - this portrait seems a bit random to me!
I hope you see what I mean; I also hope I was not too harsh.