If you don't want the crinkled look, why not just use a batting that won't shrink if you don't want any shrinkage. Quilters Dream and Hobbs both make wonderful polyester batting that won't shrink and do not beard like the old fasioned poly's used to. They also give lovely definition to your quilting. Hobb's Heirloom 80/20 blend has minimal shrinkage. Like so many others, I actually like that slight puckering you get around the quilting stiches after the batting has shrunk a tiny bit.
I don't prewash my fabrics so much for shrinking as I do to remove the factory applied sizing and chemicals and to flush out bleeders. I also prefer to work with washed fabric. I don't always starch my fabric. Not only that but the process of prewashing and then ironing to put in my stash allows me to play with my fabric and closely inspect every bit of it for any problems.