Your feathers are lovely. I like the idea of echoing the feathers with a stitched scalloped row (or two). If you decide to do that, I’d cut “binding” fabric three or four inches wide, sew it, right sides together to the front, in the scallop design, trim and turn to the back and hand sew that straight edge. You'd have a lovely scalloped edge to the quilt and it'd "fit" the feathering perfectly. Great job.