I love your quilt-- so cute! If it were mine, I'd want to see more quilting. The SID is invisible... It would be amazing if you could fill in the backgrounds behind the cups with some small meandering, but if that sounds like too much work (or quilting) you could straight stitch 1/2" or 1" on either side of all the block seams, as someone on the first page suggested. This will give a "grid" look to the quilting and also fill in more of the empty background space of the blocks. Any which way, it's adorable!