It took so long to load the above picture that I missed my chance to comment on it. If you hit your enlargement system (mine is "command+") you can see the large waves coming down thru the quilt. The side-ways seams are quilting-as-you-go seams. It is not intrusive and it strengthens the quilt... this one is going into a bus for a boys choir (which does a lot of traveling to "gigs").
Hope this gives you another persepective. Sorry these letters aren't together!