First off, she could use a bit more muscle. That would help her appearance a lot. Her shoulder and croup look a bit steep but nothing terrible. Her back is a little long and she looks camped out all around. That could be due to how she was set up for the pic though. Her coloring is just stunning and she looks like a very sweet girl.
Being camped out means that her front feet are out in front of vertical and her back feet are out behind vertical. Ideally, a horse's legs should come straight down from the shoulder to the fetlock but it is a pretty rare thing to find a horse like that. Just some riding will build tons of muscle. She is just a bit flabby from being out of work from the sounds of it.
I think she looks pretty good. I would just suggest working on getting muscle into her back, and give her a butt. She looks like she has a really nice neck on her. I absolutely love her coloring. More specifically, the white patch on her left front knee. It's like her leg is a puzzle and she's missing a piece. I LOVE IT. =]]]