I wouldn't mind if they implemented more specific weapon mods, ones that that affect stability and other base stats, or provide more interesting perks like outlaw or dragonfly. It would be tricky to balance, because obviously certain weapon types shouldn't have certain perks. If they did do this, it would add a larger rng factor (because mod drops are fairly random right now). More specific weapon mods would allow for a more customized playstyle, which I'm sure everyone would appreciate.