I think you may be talking about using borders for the drops and that is certainly acceptable. Some quilts have blocks part way down and the borders add enough to make a longer drop. Here's a link to a pic of one of those. Country Cottage Cotton Patchwork Quilt Bedding

Others have quite a bit of fabric/wide borders for drop. Look at Jacqueline on this page https://www.google.com/search?source...ilts+with+drop

Others are all block to edge like the My World Kelsey on above page. These are commercial ones but give you the look.

So you have the freedom to design it anyway you like. : ) They all look fine.