not really in a position to give advice on such photography as not really my area......... however a few thoughts and observations...
on the whole very pleasing. Nothing to fault much really (from my point of view)
I assume some kind of white / clear perspex on the floor to create the shadows?
Couple of minor niggles (things I noticed that do not detract from the pic as such, just my opinions.)
1) Bra showing through the top is a bit distracting, maybe a slightly more opaque top?
2) That tiny tiny pinprick of white light under her right knee (back of) from how she is posing... I am guessing because so central and so white against the black around it, i find it draws the eye....
However I am probably talking b****x as way better than I could do....