batting is always a personal choice- back in the 80's my mom & siblings made dozens of denim patch work quilts (with buffalo batts) and sold them in a lighthouse gift shop- they were heavy- lofty- fabulous quilts people snatched up-
some people do not like heavy quilts and forgo batting often regardless of top/backing- some people make flannel quilts without batting -some always put in batting- some make fleece quilts with batting some without- i always decide on the purpose of the quilt- do i want it heavy warm? then i use batting- is it for picnics in the park in the summer time? then no batting---make it the way you want to.