I am really enjoying the wider range of ethnic types appearing in the game since CL, but I too have found that the townie generation function doesn't always get things right. I have seen some really implausible combinations of name and ethnic appearance and yes, it does bother me.
Like some other players, I periodically go through all the NPC households in my game and edit them in CAS. I don't bother to use full edit mode, but I fix what I can to make the characters' appearance match their names (eg, change skin & hair color and features) and I change their clothes and body shape to something one would be more likely to find in RL. My game seems to have an inexplicable preference for certain clothing items (the maxi skirt is one of them) and these seem to show up all over the place, ad nauseam, regardless of suitability. Also, I have found lately that most of my townie women are impossibly fat, with enormous stomachs. I know that obesity is on the rise in RL, but this is going a bit too far...