I heard from around the official forum, that people used it to eliminate the annoying pirate boots randomly generated townies wore as swimsuits, along with those maternity tops (Generations: it has the similar style to the base game, but it's a looser fit). I thought it was suppose to give you more control in CAS, like making it so randomly generated townies and NPC's (Paparazzi, Drifters, etc) won't show up with weird looking CC outfits. (and I don't just mean third party, I mean certain outfits I bought at the store).