Seconding this. In a game with such a heavy focus on cosmetics and fashion it seems bizarre that so many weapon visuals are lost and unavailable for use.
Recreating these lost weapons as camos could provide more incentive to do content, if they're scattered as drops, title rewards, trade-ins etc.
To be honest I'd like to see weapon camos per weapon slot too instead of just being able to equip 1 at a time, and in general I'd like to see weapon skins be as easy to switch around as outfits are, though given the monetisation of the transmute passes I'm not exactly holding my breath. But I hope more consideration of a less clunky, more user-friendly transmute/weapon skin system is given to NGS.