When I first started making layered bows, they all looked bulky in the middle, but that "improved" when my bows started looking perkier! I know it sounds weird, because the middles never really got less bulky! But making sure my folds were correct, and the bows were properly shaped, made it so that you really no longer notice how much ribbon there is in the center, because the loops are so much taller than the center of the bow.
I hope that makes sense????
Deanna www.birdsongbows.etsy.com www.birdsongbows.blogspot.com