Your dragonflies are great but you don't want it to look too child-like. Maybe you could find a nice floral in the colors hubby chose and use your wonderful dragonflies on a inner border. You did not say how big the quilt would be but I think you need something to boost the drama a little. I know how hard it is to design something without a clear picture, I had the same thing this summer. My instructions were lots of brown and flowers. Good luck!