I agree with no sashing, but you could lay out a large piece of fabric that might be used for sashing and lay the pieces on it. A design wall, the floor or a camera would help to see this in perspective.
But I have another idea if you want it bigger. Double disappear it. Lay four of your pieces as the corners of another nine-patch, keeping the centers toward the center. Add a new center the size of those blocks, either the same as your old centers or a different coordinating color. Now add new patches to the four sides (probably a neutral) and sew that 9-patch together. Now when you disappear the 9-patch you have a whole new pattern and a much larger quilt.