Just got to the photos - these are beautiful....May I make a suggestion? Have you thought about adding sashing between these blocks? Like perhaps the dark green that appears in most of these squares? That would frame each of the blocks (squares) and (I believe) really set each off.
You could add a 1 1/2 in strip to the right side of each block, except the final one in each row. When each row is then stitched together, you can add a 1 1/2 unfinished strip between each row as you are piecing the rows together. Then add the 1 1/2 inch unfinished strip to each side, and A 1 1/2 inch strip across the top and bottom.
Whatever you decide, I am certain it will be FAB! Please post pics as you are progressing with piecing the quilt top. We all are very interested. :D