Originally Posted by
Auron1_TLM
As explained some ago by Ubisoft, the idea behind the new modding system is to avoid that 99% of players who use a weapon end up with the very same loadout. It basically kills the customization part. And I agree: the only reason to have 2 MPX fitted with different mods is mostly because I/you want to use something different mainly for fun. Definitely not for PvP (maybe PvE).
However, the current system gives you too much drawback to be really useful: a -20% CHC or CHD is awful, when you only gain a +10% ACC or STB.
Personally, I suggested to make improved versions of each mod, so you can end with the high-tier where you can have 1 of these scenarios:
1) higher bonus - same malus
2) same bonus - lower malus
3) same bonus - no malus at all
The quartermaster of the White House will grant you the grey level of mods, you will have to create the green, blue, purple and yellow level to get the best outcome.