Aimed bursts on some of the AR families outside of G11 might make them more appealing, it certainly makes G11s sound appealing at least. Maybe just restricting aimed bursts to head, arms, legs or chest for choices (or even just legs, chest, head).
Other than that they could use a tiny damage buff, they do tend be quite low damage outside of crits, but as was mentioned if you are going to buff ARs in damage SMGs definitely need some love to go with that (maybe more precise aimed shot bursts, or more general damage for their lack of range).