Improving how townies are generated are probably one of my most wanted features. I'm not sure how they would do it, your suggestions would probably help like restricting their everyday outfits to only use a certain pack for that sim.
One thing that I think would improve their looks is to not let them wear accessories and hats, or only allow them to wear one accessory. The game always seems to randomize the most absurd combinations with accessories. I have created CAS overrides that have a "not allowed for random" tag in sims4studio for some accessories like the eyball ring.
I don't think they need to wear socks either, no premade sims are wearing socks.
