Your blocks and colors are so pretty. I would rearrange them so that the busy blocks are broken up by the plainer blocks to give the eye a "rest". Plainer blocks are good for calming it down. Also, maybe instead of the solid light gray
blocks, you might find a gray and white print or yellow and white print to use, but not too busy of a pattern. Maybe you can consider using a black and white print instead of the solid black block. That way, the eye can rest, but the solid blocks will have a little more interest. You can try rearranging them by looking at the sections as nine patches and balance each section between busy and plain. If you choose to sash it, instead of solid black, maybe a tone on tone black would be pretty. Great job on the pieced blocks, the choices of print and color are really nice.