I have found that using freezer paper for regular paper piecing is doable (do-able? Neither word looks right. Sorry.) but I have to shorten my stitch length a lot more. So instead of using a 1.5 stitch length like I normally would with any other papers, I needed to use a 1.0 to get it to perforate without stretching the seams too much.
I like using the freezer paper (to iron onto the signature area) for stabilizing anywhere I need to write. I know a lot of people swear by tape or sandpaper behind their work but I find this works best for me.