I agree w/ what nearly everyone has already said, the snowmen fabric takes away from the beautiful embroidery. I would put a narrow frame (solid color) as has been described, change the sashing to a WOW fabric. If your heart is set on cornerstones I would do a solid of what ever color the frame is, or fussy cut a simple complimentary print (like a snow flake). Then I would take the current sashing and either use it as the binding or piece it together in some logical way and use it for part of the backing.