Been playing a fair bit as light medic with carb-9. Basically it doesn't two-shot but it has absolutely negligible recoil, even when bouncing around like a rabbit on amphetamines.
You'd be so *dancing* insane to use anything else at this point its not even funny.
For those who want to level fast and raep faec:
Carb 9 - muzzle flash - front grip - drum magazine - run at people screaming and watch them melt, especially if you have kevlar or medic buffs.
Its not a bad game as such, if a shoddy-arse release. But yeah, carb/the other decent smg is going to get nerfed or pretty much everything else is going to get buffed at some point, or 99% of players will use them.
Oh also, lights/mediums with miniguns are console exploits, and purely visual. They actually have the stats of a heavy, and probably the hitbox.