Bungie have been listening to complaints of Destiny 2 players about their characters not being powerful enough or not moving fast enough and acted on it with the 1.1.4 update, which brings weapon buffs, class tweaks, unique rewards, etc.
The devs say that they had a few weapon concepts they really liked, albeit they would've been more at home in Destiny 1 than its successor. However, it was high time to shake things up.
As far as weapon changes go, there doesn't seem to be a weapon in Destiny 2 that hasn't received a PvE related buff. In fact, most weapons at least received a 10-15 per cent PvE damage increase, whereas Shotgun and Linear Fusion Rifles have been buffed by as much as 35 and 50 per cent, respectively.
Output of each of the increments of Mobility stats have apparently been boosted by 2-10. Movement speed of melee Supers have been boosted as well, whereas Supers themselves will be more frequent, courtesy of regeneration rates down to 5 minutes.
Bungie say they've addressed Exotic repetition, meaning no more duplicate Exotics from Exotic Engrams. Nightfalls are looking at unique rewards in Legendary weapon and Exotic accessories, whose drop rates will be more likely the better your score is.
The Crucible team has also received a slew of improvements, mostly related to speeding up the flow of games. The devs claim that the speed changes paved way to some spectacular moves in Destiny 2, which they think will make for really interesting viewing.
The devs said that the changes to Destiny 2's dynamics are a risk that they're ready to take. However, it seems like the real risk was stepping away from Destiny 1's tried and true recipes to begin with, making the update seem like actual backpedalling.
In fact, the latest Destiny 2 changes are widely regarded as operation save Destiny 2 and it's obvious that Bungie are clutching at straws to keep the game relevant. Unfortunately, such arguably radical moves have a history of backfiring so good luck Bungie. You'll probably need it.