Not a lot. Two new exotics and some more Y1s being updated to Y2. In December there's going to be a big weapon balance overhaul though. - Auto Rifles are getting a small buff to base damage depending on archetype. - Pulse rifles are getting a small nerf to base damage depending on archetype, and their range is being nerfed quite a bit. Slight boost to PvE damage multiplier. - Hand Cannons are getting an accuracy buff while aiming down sights. - Shotguns are getting a serious nerf. More recoil across all archetypes. Damage drop off will start at about melee lunge range, but it will end at a bit longer range than it does currently, so it's a smoother drop off curve. Equip and stow speed is being decreased. Aim down sights speed is being decreased. Base (non-sprint) movement speed with a shotgun equipped is being decreased. And there will be a two frame delay before firing when coming out of a sprint. Slight boost to PvE damage multiplier. - Sidarms equip and stow speed is being increased. - Snipers with Luck in the Chamber will only proc the bonus damage on headshots. - A variety of tweaks to Fusion Rifles that I didn't pay much attention to because I don't really use them.

Not much, back to the wasteland we go!

Bungie's bringing back a couple of year one exotics in the December update, for example, MIDA, Plan C, and Nothing Manacles just to name a few. Also, shotguns are getting nerfed pretty badly, along with other changes. Auto rifles are getting a small base damage increase. Pulse rifles are getting a base damage decrease, and hand cannons are getting an ADS (aim down sights) accuracy boost. Some exotics have also been changed. Hawkmoon is gettting a range decrease. Black Spindle is getting its scopes removed, and they will be replaced by ballistics upgrades. The Chaperone is getting a damage decrease, (as are all shotguns) but its precision damage is getting a considerable boost. There are a couple others, just read the weekly update if you want to know. TL;DR: Quite a few exotics are getting changed, and weapons are being buffed and nerfed all across the board.

Their bringing back some y1 exotics