Ok. The only real problem with this image in my opinion is the grass in front of her face. And if it didn't cross her eye and stuff it wouldn't be that bad.
Another nitpick would be that the horizon is tilted, or appears that way.
A little more light on the subject (especially in the eyes) couldn't have hurt.
I love the backlighting and the way it outlines her.
Some people would say 'the sky is blown' (too bright) or nitpick about the lens flare but I don't think either of those is an issue here and the end result looks good.