I have a layout I am going with, I showed pictures to a friend's grandson and he asked why I didn't put all the color in the center. I told him I had thought about doing that. I sewed my color blocks together so that it would be easier to move things around a little. I have 6 separate "other" color blocks. Yellow, purple, blue/peach, rust, maroon/batik and orange. One epiphany I had was to layout the peach and black blocks on the diagonal and then I placed the colored stars on each side of that diagonal. Can you see the peach going top right to bottom left through the center.
I've had fun playing with this and have sewn most of the star rows together. I plan to continue sewing those rows together and then I can start working on the "sashing" rows. The majority of the cornerstones are blue but I have lots of other colors too so that will be the next decision I will have to work on.