Different colored shirts for example.
Include women's clothing as well, such as long skirts. Hey, there's no accounting for taste in the wasteland. :)
maybe different sized backpacks?
New items, including clothes are an ongoing thing. There will be such, though I'd agree that in case of more vague, labelless pieces - slight pallette swaps, allowing slight color variations of particular items would be a small but nice addition.
Maybe some camo action?