Let me ask you this, how many times are people going to be that close to the quilt to see any mismatched seams? Unless, of course, if you point them out to them. I have opened a seam in an area that I don't like and pressed it and slid it around to suit me and sewed it back up. It might still not be as perfect as YOU would like but good enough. We are too critical of our own work. Relax and enjoy that you have it almost finished, and the quilting will change how it looks anyway, for the better even.