I'm on mist with this one, simply because i'm lead of the balance team.
I've spoke to opal in the past about adding a mod that can make the famas fully auto etc. His response was "that would make it the same as every other gun therefore making it not viable" Just to clear up that point.
The Famas did get a buff, (It's crazy I know who would of guessed it has been nerfed and buffed like the other guns!) it had the delay between each single shot in it's burst reduced and it's recoil got reduced recently.
The gun it's self I always hear people say it's shit, or whatever. The base gun it's self, yes, isn't that great neither are guns like the aug, tec-9, the m4a1. But when you put some tier 2's on it then eventually some tier 3's it makes the gun stupid good. Just like it does all guns the mods make the guns good.
What me and Opal need to go over once their new big update has been released whenever that is, is strip back the mods and change how they work and tweak their numbers. A lot of the base guns aren't amazing, but when fully modded makes the guns very very good. The famas isn't in the meta simply because people don't like burst weapons in source the hit reg isn't great, we can't do anything about this unfortunately.
I also fear if we re buff the famas like it once was it'll become one of the best guns again and will destroy anyone any range without much fail which is how it was back before march when it got it's big nerf if we gave it a damage buff and a bigger rof buff again. Remember MODS are a thing, we have rapid fire 3 which makes it 20% fire rate. Believe me when I say the famas is a gun that requires some skill to use, marksman + rapid fire, hit a headshot that person is on the floor quicker than mist is on gmod because of this crappy Qatar aim.
However don't get me wrong i'm happy to hear ways that people would buff the famas further, personally I don't think it needs a fire rate buff, with rapid fire it shoots really quick, potentially a small damage buff but this wont do much to the gun.