I've made a lot of wearable art type jackets over the years. The technique that works best for me is to not use any batting or flannel. I use a bottom weight twill fabric or fabric that I've interfaced with fusi knit type interfacing for the base. I place this with the fabric (or right side of fabric) down and build the piecing directly on this so that I don't have to do a lot of piecing and then cut it all off at the edges. The result is a jacket that isn't bulky and doesn't add 20 lbs to your weight. I often use the stitch and flip technique so everything is solid and won't move around on you. At this point quilting is mostly for decoration. I quilt mine because I like the look. Also, you don't have to add a lining as the base fabric becomes your lining. I usually serge the seams but if you don't have a serger, you can use a hong kong finish or any other seam finish on your seams. I've done this method probably 10 times and it works great.