I love it as it is.
I use Thermore batting almost exclusively. It only needs quilting every 10". Seriously, even though it would mean lots of starts and stops, I would probably do stitch in the ditch in red on the red squares, blue on the 'ribbons', quilt a star in blue in the center of the stars and quilt a leaf or some such in the trapezoids and borders.
If you are considering doing this pattern again, since the white areas bother you, you could replace the trapezoids with a paler version of the star fabric color. Maybe do deep green stars, pale green trapezoids, burnt orange squares and gold ribbons, for a nice Fall effect.