I agree as well. In a few years, when she's more womanly and better proportioned and knows how to carry herself and take advantage of her unique features, I think she will look totally amazing. Right now, she looks like a little girl playing dress-ups in mummy's clothes and make-up. Her youth and underdeveloped body is very apparent on the runway, whereas, in photos, it can be disguised better.
I think her career is a case of too much too soon, which doesn't necessarily mean she doesn't have the the mental maturity. It just means she doesn't look like she belongs with the rest of the models who wear adult clothes for a living, despite the fact that she may be 15 and that there are other 15 year olds working as models as well.