Looks like the link is a bit messed up; is this is the doll you wanted to post?
Anyway, the hairline seems to be a little too high, and the shirt could use some highlights, but otherwise those parts are really improved. I really like that one-sided ponytail hairstyle
As for the pants, it looks like you're just randomly scribbling on them - that's not real shading. You need to look at where shadows and folds are, and make those parts darker. I understand you're trying to go for the rough texture of jeans, which can be difficult to achieve, but you need to concentrate on shading first, textures later. But do keep practising!