My daughter kept all the grandsons PJ's, housecoats, and flannel boxers since they were babies, and presented the large black garbage bags with about 60 items, I washed them all, scavenged what I could (remember these are boys, so lots of holes and tears), ended up with enough flannel to make a quilt for each of the 3 boys.
I found a really fuzzy blanket at Cosco, took it over to my longarm person, and she put it onto the flannel top - no batting - she was concerned that it may stretch, telling me after she had stitched it all, that it was no problem for longarm quilting. It turned out really lovely, not heavy, but very warm according to the boys.
My youngest grandson told me "It is the best blankie ever". Just another idea for you.