https://www.pcgamer.com/destiny-2-forsaken-patch-notes-and-post-launch-plans-revealed/

Destiny 2: Forsaken won't be live for another week, but the Destiny 2 Update 2.0 patch notes are here right now. There's a lot to catch up on, including changes to character classes and the in-game economy, buffs and nerfs to various exotics, and of course those long-awaited weapon slot changes are finally upon us. 

The details get pretty granular on that front, but highlights include tweaks to Sleeper Simulant—the magazine size is up, but base damage is down, which is unfortunate—and a change to "box breathing" that will dial down Whisper of the Worm somewhat. Which should come as no surprise because a) the change was hinted at in a developer stream, and b) the gun enables coordinated teams to spawn kill most strike bosses as is.