I love making string quilts; have made at least three large ones using Bonnie Hunter's patterns. Have never had an issue removing either phone book paper (my favorite) or just regular printer paper. Following Bonnie's guidelines, I sew with a shortened stitch (about 1.5 on my Bernina) AND a denim needle-size 90/14. The shortened stitch and larger needle duo makes it super easy to remove paper; in fact sometimes the paper wants to perforate and fall off before I finish a block, so I have to increase the stitch length a little
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If you're not already using a 90/14 needle, give it a try and see if it makes paper removal easier for you.
Margaret