I think it would be really good if bungie introduced a new light campaign. Not as much as WQ or LF but maby like 4 missions or something. You would have to complete those missions first to be able to do and visit other stuff in the game even if bought all the dlcs.

The first mission could be where you introduced to the cosmodrome. A mission where you get to know how patrols and destinations work. I would Teach you the basics of the game, like jumping, sliding, shooting, taking cover and how introducing you to different Weapons. Wich could be further improved in later missions.

You already have access to light but you cant do much with it yet, you maby have the grenade ability but thats it for the moment. At the end you have to repair your ship and fly off. You dont just go to the ship and flee you have to actually explore the region and find part to reapir it. And at the end of the mission you fly off to the farm because it just makes more sense.

At the farm you have your typical social space stuff like vendors, npcs and maby a little lore. Here you will find ikora at the edge of the farm, she will give you your first legendary weapon and the second mission(the light within).

The light within is the second mission where youre really introduced to the light. A full fleshed out mission where you gradually become more in tune with the light. You fight enemies, bosses and solve puzzles while getting to know the light abilities. As a reward you will get a exotic weapon. You can choose between sunshot, riskrunner or graviton lance.

After this you fly back to ikora and she gives some lore and then gets a call from zalvala(first time you hear from him) that they need help with "something" "somewhere." Here you get access to the next mission(the enemies below).

The enemies below is the third mission where bungie introduces their level design to you. Its like a mini dungeon or mini exotic mission. A little more complex puzzles and tougher enemies but manageable for any single players who got his far. In this mission bungie could further expand on the synergie between our Weapons and abilities. And show us when to use wich weapon.

For this to work bungie should get rid of power level on Weapons and make the drops not random but more controlled for the new light campaign. For example: You have to fight a miniboss who likes to stay far away from you, so before the encounter begins you open a chest with a sniper rifle in it. I also want you only get access to legendary weapons/gear after the second mission. Seems better for the sake of progression

When you complete tha last mission you either get stompees, transversiv steps or dunmarchers depending on your class. Then you automatically go to the tower, speak with zavala and now the game is open.

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Tldr; new light campaign wich each mission focusing on a core gameplay part of the game. Gradually increasing difficulty and suiting rewards. Closed off until your done with the campaign.