Hi Aileen,
I don't have much to add: like others, I think from your picture that it's fine. It looks like a celtic knot-type pattern to me, not a squished cable. Another thing to keep in mind is that the corners of quilts fold when the quilt is on the bed, so the quilting is less noticeable in that area. You don't even see the whole corner motif at once. I'm glad you're more happy with it; I think it's beautiful, and you should be proud of it! Your hand stitching is really lovely.