I had started on another dress like this - scoop-neck, a-line - then I a-lined it more, and after two interruptions where I had to drop it to work on something else, I'm back to it now and getting near the end.
From fabric I had on hand, but not enough for the sleeves, so I used some lightweight linen in a matching color. Then I thought to embroider a running stitch with the same plum shade. The stitching echoes the "dashes" on the fabric, I think.
Then I decided to do another row.
My embroidery skills are rudimentary, but I won't let that stop me. Now I just have to figure out the hem. A linen ruffle peeking out?