Fact 1: Destiny, the game, lacks story and character development which starves the player of immersion. Fact 2: the Grimoire cards contain extensive lore that would greatly benefit the game. Here is my suggestion, and I don't think that it's out of the question due to the fact that the cave "disturb remains" interaction was added: When conversing with vendors and characters around the tower, by pressing R1/RB, the menu shifts and has a list of the Grimoire cards associated with that character. Shift the menu again, and you can ask that character questions/talk (which can be updated as different events occurs within Destiny). Eg; Not everybody in the tower is going to trust Eris, so some characters may have a thing or two to say about her. I'm not going to demand these features or anything like that, but I do believe that proper in-game interactions with these characters would immediately deliver a whole chunk of desired in-game lore and develop the vendors that we interact with on a regular basis. Reading through the Grimoire cards, these characters have amazing stories, but not everybody realises this due to the lore's separation from the game. Thanks for reading. :)