I wish the SMG was back, I liked the rate of fire, and how awesome it sounded in halo 3, I can only imagine how awesome it would have been in Halo 4
And imagine if you could add attachments like the suppresor or red dot, or dual wield! I think it would have been a great weapon to bring back, but idk if anyone else would agree. Maybe 343i is saving that for Halo 5 