The G11 isn't used because it's so average, when compared to p90, G11 and G11e are both outmatched.
If we could craft them with bonuses they may be utilised more, but I think the p90 would still be better. G11e has a nice single shot mode when aiming eyes, but the .223 pistol outclasses it except in the case of extremely high crit rolls. Now that SMGs cant be used by sneaks there are no combat builds that even consider the G11 as a viable weapon.
As for the vindi shooting 2mm and making 4.7 craftable, I'm not sure, sounds reasonable.