I've used fleece backs and tied quilts for homeless people. I have sometimes used batting also, sometimes not, depending whether the shelter had heat at night or not.
What I wonder is:
--how it would be if I used a normal cotton top, fleece for batting, and a normal cotton backing or
--what would happen if I tried to QAYG with fleece as a back and sewing strips (for string quilts, for instance) in a flip and sew method directly on top of that. Would it be hard to sew those fleece-backed blocks together?
--Do you have problems with fleece getting into your machines?