Nothing wrong with that. You don't need any of this story to enjoy destiny. I'm probably one of the few that likes the grimoire system. Destiny can be thoroughly enjoyed without reading any of it, and for those that do, can enjoy an entire different layer of the story without over whelming the actual game. If they tried to bring all the grimoire into the game, frankly it would be overwhelming I think. Bungie just needs to clean up the in game story a bit, but they have got progressively better each DLC so we will see with RoI