Mm, interesting idea. I would still have to rush to update, most times, though, basically whenever there's a new piece of clothing. The model texture assets don't stay the same, they have more clothes added to them, so if I'm overriding it with an old version, it'll screw up anything new.
However, I have thought of making the recolour swap system separate into a separate mod from the clothing closet system.
So, I'd have an asset zip, with all the images, and a zip with the recolour menu stuff, and a zip with everything else.
Will probably take a while before I do that, though, as I'd have to rewrite a lot of it so the conditionals aren't intermingled.