Back in Forsaken the weekly flashpoint would make on destination much harder, and contribute % progress to the flashpoint, which if completed would drop Nightfall level loot. This sounds like a relatively simple thing to add (blindly assuming), and would drive the player-base to visit all of the previous destinations. As rewards go they could be specific to each of the seasons that took place there, adding red borders as possible drops would let new and returning players flesh out collections. As at the time of writing I can only hope Xur drops a red border for older weapons, or use my 5 deepsight harmonizers to get 1 weapon. Make the planets fun again.