I've actually thought about that. The way I programmed sprite changes when I first started would have made it overly complex, but I've since learned a much, much easier way to do it that would make showing different versions of Connor's top or another guy's full outfit pretty simple.
CGs, however, would require making multiple versions of each image, and I'd also have to write some different dialogue/monologue to account for the differences. I'm trying to simplify alternates like that, but if there comes a point in a story where it feels like Connor or another guy should have a choice of outfit, I'll definitely consider adding it.