That's a really cool idea! I'm not sure of the specifics, but I believe digital printing on fabric isn't outrageously expensive, and being custom made per layout would let you hide a lot of the patch-like structure with the actual design. (I imagine it would be a lot less noticeable if a seam follows a line in the design, or a pleat like in the dress examples from the paper) Insanely cool value prop to get some of these patches in the mail, that assemble into a choice of a few different garments, all pairing well together. And if you like a fabric/pattern from a prior piece, now it can be a highlight in another garment.

Please make a men's size+cut version if you do that, you have an interested customer #1!