I am "guilty" of rewriting patterns for my own personal use. I love to paper piece and many times I've looked at a traditionally pieced block and reworked it into a paper pieced block. Block looks identical at the end, but I changed up the technique I used to make it. I've mentioned this to other people and some are shocked that I would do such a thing and others are "wow, why didn't I think of that?". As long as you don't profit from the pattern, I don't see anything wrong with this "rewrite". Just My 2 Cents...for what they're worth.