That's really not true at all. You learn more about The Reapers (with minimal cutscenes) is the first 20 minutes of gameplay of mass effect 1 than literally anything within destiny or its expansions. Sure the grimoire might hold a lot of lore. Problem is it's all out of order, not unlocked, or simply incoherent. And I just don't have the time to try and string it all together. I really respect the people who have figured a lot of the lore out. But the grimoire was a horrible idea, this was supposed to be a video game, not an encyclopedia with several pages missing.