Like others have said, it is hard to tell much from just that one picture but from what I can see, I don't see much that is horribly wrong with her confo. She does appear to have a very slight roach back, but that's about all I can say.
As for her bloodlines, they are pretty average. Not too many well known horses until you get 4 and 5 generations back. Even there, no super big names except for Peppy San Badger. However, he's so far back in her lines, that she likely wouldn't show much of his influence anyway. She'd probably make a very nice little all-around horse, if she isn't one already.