You did a nice job. As others have said it is a personal choice. If you want the butterflies to pop out more then do some fill work in the backgrounds. To give the feathers more deffination consider stitching a vein in each one from the spine curving up the center just over half way and backtrack back to the spine. Sounds difficult but not and can help bobbles in the spine. No I didn’t notice any bobbles in your spine. It all depends on what pleases you it’s your quilt.