I voted for a 'no', but I would like to give my reasons.

Personally, I like the idea of having guns revamps, but in my opinion, the guns are already fine, and I think that their gun skin is made to fit the theme. There's a really famous expression that says: "Do not fix something that is not broken", which in my opinion I find it to be a suitable statement for this idea.

Even though this idea is denied by the OP, it would be nice to have the options for being able to choose between the old gun skins and the new ones, since there are many players that would prefer choosing between both skins. This idea wouldn't do any harm to the game, and I find it to be a correct decision for this idea.