I have to agree with the other commenters, well composed and well captured do not always an interesting picture make. The worst flaw is that she looks bored. Boredom only looks interesting in counterpoint to something in the picture that the viewer should NOT be bored at, and then you have to over-act it a bit, kind of a dramatic boredom.
Of course, this could have been your point, but the psyche of western culture is so ingrained in the thought of being chained only being a very bad thing (or a sado-masochistic adventure) that the look just doesn't make sense.