I would like an overhall to all guns currently in game, as far as the way that they look. I mean all this Diablo inspired tmog gear is in game, how about some modern COD/Overwatch guns/bows inspired weapons and Tmog gear? It would be an awesome way to introduce dual weilded pistols 
But the ovehaul is needed for the existing guns within game. Most are pretty terrible looking or too basic imo. Make more either gray or black colors, like real firearms because most guns ingame have to have a specific color scheme mog for them. What I mean is because of the limited or strict colors you have made to guns in game, designing the mog you start weapon first because the other way you will have a good mog put together but no gun that matches it. There should also be another look at placement when "sheathed " on your back, some are placed too high or too low. Other than that love what you guys are doing cosmetically. Peace