I saw the film when they screened it at the Museum of Fine Arts last spring here in Boston. There were aspects of her parents that I found a little troubling, but on the whole, I think they saw her for the very good artist that she was, and that they loved her, but weren't able to recognize that she might have issues with depression.
Her work feels mature for her age, but it still feels like student work to me. I think she was a bit more intense and prolific than many art students, and I suspect that had she lived, she might have become a great fashion photographer. It's a shame that all we have is her student work, but I think it shows more potential than what most student work reveals, and it's rare, I think, to find someone this young making work as interesting as she was. Photography doesn't seem to lend itself to prodigies, but she's about as close to it as possible.