Smart Modules may not be quite as pointless as Extended Magazines, but not by much, IMHO. Assault Rifles have only three feats/special attacks that benefit from the damage boost, Aimed Shot, Rapid Fire and Point Shot. SMGs have one more, in the form of Kneecap Shot, but SMGs are so thoroughly focused on burst fire that there's very little reason to not build around that. With ARs you can go for single shots, but in that case you want to maximize your critical hit chance and damage, which means using one of the crit scopes and a Rapid Reloader on a 9mm Chimera.
So, is there really any reason to take a Smart Module on ARs and SMGs, instead of a more useful attachment?