https://www.polygon.com/2018/8/10/17677304/destiny-2-forsaken-gear-power-rewards

Destiny 2 developer Bungie wants the nature of power acquisition to change in the upcoming Forsaken expansion, the studio said in its latest This Week at Bungie post. Bungie is looking to return the system to how it worked in the original Destiny, with the power cap being much more difficult to hit.

To achieve this, Destiny 2: Forsaken will give players higher power rewards when doing something difficult, and smaller power boosts when the activity is trivial. Some power changes will also be mysteries, and most have been removed from the Director.