I changed the pattern by adding an inner border that extends the brown diamonds - I liked the points 'closed' rather than open at the outer edge. Then added 4 pinwheels made from leftover blocks in the corners.
My problem is that I can't decide how to quilt it. I heard that curved quilting designs show off geometric piecing, but I'm not sure how I'd apply that here. I could quilt in the ditch or a quarter inch in, along the inside of those diamonds, emphasizing the diagonal lines... but then what? Any suggestions? There's not much room to quilt inside individual triangles, although I do have cream, green and brown thread. All input appreciated!