It's no more OP than giving a guy with self heal the best mid range weapons in the game. Everyone already has access to shotguns and SMG's, so we're only getting over the fact that we're giving assault rifles to LA. A class that regularly has to cut itself off from engineer and medic support to use its abilities to the fullest anyway. Don't get me wrong, I think Heavy assault should also have the assault rifles, carbines, and scout rifles as well. So that both assault classes have a well rounded choice of weapons. As for the scout rifle, it's no stronger than an SMG for close to lower mid range. But it presents a niche option for some people who prefer a lower mid range accurate ADS weapon that has the potential for longer ranges. But I don't see it winning out in any competition for slot choice between shotguns and Assault rifles. That's why I put it down into the SMG/Carbine slot.