UPDATE: well, I went ahead and washed the quilt in an effort to reduce the stiffness caused by over-quilting. The good news is that the quilt is a little softer and more flexible after washing. The quilted borders, however, went all wavy on me. The rest of the quilt is okay, although the wool is tufting through the fabric, bearding I guess it's called. I took it into my LQS and the experts there all said they had never seen a quilt where the border turned wavy after binding and washing. Everyone agreed that it was probably due to the over-quilting. Come to think of it, after the binding was sewn on is when the waviness became apparent, and it got much worse after washing. (All the fabric was pre-washed but the batting was not.)
I'm not sure whether I will use wool batting in the future, unless I can figure out how to avoid these problems. My LA quilter offered to not charge me a quilting fee next time. I almost wish I had accepted her offer. Not feeling good about this quilt that I spent so many hours and so much money on. It's for my daughter and I'm going to give it to her anyway, but I'm not proud of how it turned out. Thanks for reading.