Not sure if I'm right, but I think there's an anatomy issue.
Here's my quick and dirty edit...

The neck seems a bit too long for me...so I shorten it by 3-4 pixel maybe? Right now, its like... the neck growing on top of that necklace.
Also, I think the shoulder is too far away from the body, it looks like a separated object.
...and I also puff up the hair a little.
Btw, I think the improvement is great. In the first post, I thought she looked kinda spooky. But the latest edit, she actually has some very attractive features : )