Mehh!!! You should just enable the skin editing again!! And patch it so that people can't edit the recoil/ammo, etc. Just the skins. I don't care if nobody else could see it, It would just be awesome. Especially for frags.
Yes yes, I know, you could just turn your regular m4 into a gold m4 for example, and Aeria might lose money. And of course, modders will find a way into editing the recoil/ammo, whatever. But c'mon!!