Have they not considered anything like this? Instead of the grimoire system from D1, why not have a “Loremaster” or Librarian at the tower in which you can unlock and view events? A timeline. Some would be simply for completing things and would unlock all associated lore, others could be secrets discovered from scanning things in the environment.
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That would be FANTASTIC. And maybe you could run around doing adventures for them, helping find information that contributes to the overall lore of the universe.