I think the hair isnt right. looks too plastic and stuck on. I think this could be rectified by making it smoother with MUCH shallower detailing, especially on the head. The hair tips need to be merged with the chest/shoulders, blend them in. If you want to indicate hair curling away from the body at the tips. confine it to just a couple of bunches and make the tips more pointed.
The raised arm: The lower part (ie upper arm anatomically) seems too curved and also a little too thin in relation to the fore arm. This arm also looks detatched and too high at the shoulder region, but this could correct itself if the other things about the arm are corrected.
Finally I love the folds in the fabric and the neck line of the dress they are spot on and remind me of the ancient grecian marble sculptures I saw in Athens