Well, since it's a 5.56 gun, it wouldn't be any different than an American AK-74M. There will be plenty of control, but damage isn't that impressive, especially at close range with the low ROF. The ROF was what made the FAMAS the crazy gun, not the damage. What we're getting here are two rock solid ARs that will likely be very controllable and accurate at range. Heck, even the LSAT and L86A1 are pretty slow firing.
Now what's REALLY gonna go broken are the Engineer guns. The ACR-W sounds like it's firing AT LEAST at 850rpm. More likely 900. The MTAR-21 fires at anything from 750-900rpm and will likely fall in the 750-850 range from what it sounds like in the video. There's gonna be some fast firing carbines which will be amazing for CQB. Those, the SPAS-12 and the 900rpm MP5K are the CQC guns, and appropriately so, but the ARs and LMGs for this next expansion are all gonna be pretty conservative.