This is a great idea!
In a blouse or dress, what type of shoulder line would these pleats look good with? I have some boxy camp shirt type silk shirts I would like to try this with but the shoulder line/upper sleeve is also very boxy and hangs down over my shoulder a few inches. (I am narrow shouldered too.) I am thinking I would have to rework the whole sleeve to pull that line up some. Or do you think a few pleats over the shoulder might work in addition to pleats at the waist? Or would that be too much of a good thing?