Give your client links to these two topics which shows the effect of "before" and "after" in what thoughtful quilting can do to enhance an embroidered block. They don't have to be this heavily quilted but some quilting will definitely make a difference for the better:
http://www.quiltingboard.com/picture...g-t261317.html
http://www.quiltingboard.com/picture...d-t262627.html