Anyone who has played any of the mass effect games will surely remember the codex, an in game encyclopedia of all of the games lore that is not spoken. I think that destiny 2 should incorporate something similar to this. The grimoire cards in destiny are not necessarily a bad idea, they are just pulled off horribly, in destiny 2, there should be a way to access all of the grimoire cards in-game. Basically just take the organization of the cards not and put an inventory-accessible book tab where you can read them, without ever having to leave the game.