Are you planning to fussy-cut the rightmost fabric for your inner selection? I would do so, to ensure that you get the right balance of colors for your center. There will only be a few blocks of the centermost colors.
I think that maybe adding a lighter fabric near the light blues or yellows or a darker by the first pink would be good, I agree that your values are much the same. Photographing your fabrics really makes a difference in how you view them, doesn't it?
If I may, I'm enclosing 2 pics of the batik fabric and the blooming 9 patch I'm currently working on. After I started cutting and sewing, I found that my 2 favorite fabrics are the green snake and the cobalt. They both have a small pattern with high contrast so they flow well against their neighboring fabrics.