Here what I found regarding this topic
Letter from the Producer LIVE Part XIII Q&A Summary
1:51:39
Q: Please implement a building such as a library where we can learn more details about the lore.
A: Maehiro: This is also something for which we've received numerous requests. The Lore Team has some plans drawn up for something similar, but as we're prioritizing patch releases, they're a bit behind on this. There's a ton of lore that is yet untold in Eorzea, and I think we need to go deeper into each aspect gradually, so I’d like to look into this. More than a library, I would like to make it so you can obtain literature from different situations or record parts from dialogue with NPCs, so I’m thinking a lore version of the quest journal would be more appropriate.
Yoshida: A plan for a weapons and armor compendium has come my way. The plan is to allow you to read about the origins of each weapon and armor after you have completed the series, and we would like to implement this as well.
Letter From the Producer LIVE Part XVI Q&A Summary
0:52:08
Q:
Is there any update on the weapon and armor log?
A: We've currently finished off a lot of the details, but we have to plans for implementation, we've been estimating the amount of work for each. The first idea would simply have players
building a collection of weapons and armor, while the second idea would allow players to read the lore surrounding the gear they obtain. However, this data will affect the player data used in real time, so we are carefully investigating this at the moment. Next week we will reach a conclusion and proceed for actual implementation,
but if we decide to go with the first idea it will be implemented in patch 2.4. In the case we decide on the second option, it will be implemented a bit further in the future.In any event, we've progressed quite a bit on this and we will have our verdict soon enough.