The reason I don't reduce my stitch length when paper piecing is because it makes removing the stitches in case of 'misplacement' completely impossible plus dinky stitches can pull the fabric too tight resulting in a puckered block.
In my experience, folding on the stitch line after the block is done or brushing the stitches with a damp paint brush are all that's needed to remove most types of paper effortlessly even with normal piecing stitch lengths.