I would like this. I think they can manage to do it in a way that doesn't emphasize cash shop items since that's a concern they've expressed.

I've also long wanted something that's sort of related to this, but not restricted to glamour, which is just linking of all items in the game to their sources. I'm sure this is not an easy feat given how old FFXIV is at this point, but it's something basically every live service or gacha game does, where the item description tells you where it can currently be found within the game. It would be useful for glamour, like when someone else has something on and you want to know where it comes from, but I primarily want it because I despise the menus for all the "endgame exchange" NPCs.