Sometimes with a well used quilt all you can do is incorporate it as the batting for a new project. I've turned many baby quilts into twin quilts in this way.
Before my hubby moved out here I sent him a quilt to keep him warm. Well... something happened and instead of fessing up, he washed and washed and washed that top, still didn't fix the problem and took years off it's life span and pretty much shredded the vintage fabric I used on the back before he said there was a problem.
I just cut off the old binding and using my friend's long arm, requilted a new back on it. Originally the quilting was more angular, this time I just did a wide meander over everything existing.