So, I wish armor detail would come back as an option, I would love to be able to choose Primary color, Secondary color and Armor Detail color (skins).. Or hell, I would love if we could possibly color individual pieces of armor separately from the rest such as shoulder pads or the chest. That way we really could give our Spartans an individual identity, such as Jorge who had unique coloring.. It seems it may have been a consideration during Halo 3:
I really wish we could actually do something like that. Also, I really like that not only are there different visor colors, but also different 'textures', making the visors feel pretty unique. Its kinda crazy that those ideas have been in effect since Halo 3, but never really saw the light of day until Reach.