Your quilt looks great so far. I like the idea of the flying geese and log cabin blocks. I agree with the others that your best bet may be making that a "duvet cover" for the weighted blanket. I made a weighted blanket for my friend with fibro myalagia. She loves it, but I wish I had thought of a cover.
And welcome to be board from Northern CA. I have learned a LOT from these wonderful, generous people!!