don't put so much stress on it that you take the 'joy of creating' out of the sewing. some people really are not so - detail oriented - and techniques, workmanship will improve over time- if she is happy as a lark with her project/accomplishment its ok- most of us can look back to those first quilts and see how much we have improved over the years. I have a good friend who has been quilting *creates wonderful creative quilts* - every now & then she brings me one to quilt for her- she still has 1/2" seams in spots, & barely catching seams in spots, she just doesn't worry about the technical/precision part of quilting- and she is happy. when she mentioned that she kind of felt *in a rut* always making the same style/type of quilt so fast & being bored with them I 'kindly' mentioned maybe it was time to slow down, and concentrate on improving her techniques/ workmanship- maybe choosing something new that would be a challenge & help her to slow down...her last quilt was the best in years.
sometimes it's just ok to let the creative juices flow & not stress over the *other stuff* if your 'girl' sticks with it & enjoys it she will improve- if encouraged 'gently'.