I do like it soft and subtle like this. And if you changed the colours to blues (If it is digital or you made it digital) it could even give the feel that she is underwater, as the softness gives the look she is being seen through something.

And with digital you could also choose some of the outter lines and make a new layer with a darker wider line to draw the eye into the general shape and then you'd still see the softer face.

I love it as it is of course, I only suggested things as you asked. Had you not I would have said, brava and truly meant it :)