Whatever you do .... you DO NOT want the batting inside the block seam allowances and ragged. That is why there is an X or other design sewn across the block.
I do flannel rag quilts because I like the weight and the look of them.
I am sooo glad Fiskars makes the rag snips. Now it is even fun to do the snipping of the seams.
I do go to the laundromat after I finish my quilt and wet it there, then put it in a dryer without heat. I frequently remove the built up lint. Once there isn't much lint coming off the quilt I do dry it. No way do I want to clog my washer or dryer up with all that lint.
ali