I don't know if you're up for this, but how about some applique on the plainer blocks? That way the quilt does not need to be taken apart, nor requilted. Appliques of what? That could be up to you or your customer. I'd hand applique a trailing vine (if she sends you any greens) with small colorful buds. That way it can be on the blocks you want, not on others, and will still tie the quilt together along with bringing some movement to it.
Please let us know what you decide.
we're with you in spirit,
bev. :]