One thing you could do, although I have never done this, is press the seams open, if you haven't sandwiched it yet. That would make the seams less bulky. My stitches get a little bigger on the bottom side over the seams, but I'm not compulsive about it. I go be the galloping horses rule. No one will ever notice unless they examine every stitch on the back. That said, I usually do outline quilting so avoid as many seams as possible.