I didn't even know they were doing another update for weapon balance as I've been busy with school. Hopefully Bungie nerfs the Vex Mythoclast; that gun is way too powerful.
The update is for more weapon balancing all around because of the usage stats. Nobody was using Pulse Rifles at all.
They're getting a 10% damage boost to put them more in line with the damage of the other weapons.
Nerfs coming to Hand Cannons and Pulse Rifles (slightly) and also to Auto Rifles to make them more mid-ranged as opposed to being effective at long as well.
The Mythoclast is in a good state right now. It's good from close to mid range but it's absolutely terrible at long range because of it's recoil and terrible ammo reserve. It isn't even the best gun in Crucible. It gets outgunned by the Last Word or SUROS in time to kill.