IMHO; the girl may have seen a selective colour image that she liked and thought that would look cool. Talk her out of it!!
The selective colour, no matter what other colour tones you have look like they are trying to draw your attention away from a mistake in the image.
If she still wants a selective colour try and keep it to about 10% or below on a layer and see how that looks.
With the composition, the model looks like she is doing a walk thru the frame and she is on her way out the other side, which I kind of like as it's quirky. You could crop out most of the image to her right and do a small canvas extension on her left so it becomes so off balance it looks like you shot it that way on purpose.
I actually don't mind what you have done after you look at the original frame. Well done.
Hope it helps