I know this is old content and the devs would likely prefer working on something else. They may even need to work on newer things, part of my love for the game is the love and detail they put in across the whole thing.
That being said I'm not sure if it may be a cultural difference that they might find this kind of thing enjoyable. For me it just honestly makes my depression worse some days. One of the heartless responses I hear is "Lol just learn to do the dual." when I ask people to farm for clusters or something elsewhere. I have been in the zone for a hour killing mobs to spawn the one fate. I can't even do the dual if the mission beforehand won't pop (For Absent Friends in this case, which leads to Of Steel and Flame). The truth is some of us don't have quite that level of skill or maybe have other difficulties that prevent us from winning a dual as well.
Trying to get the dual field notes from the fates just feels like an exercise in futility however. Last night I was with a person that has been doing nothing but trying to get "For Absent Friends" to spawn and do "Of Steel and Flame." We will sit there for hours, ignoring other content and players because we are afraid of missing the time it spawns. It is crushing to do all that work and get nothing from it.
Now I understand part of this was to keep people in the zone after they finished stuff, but honestly some people will get the things they want to do done and never return to the zone. Devs or anyone in the square-enix team if you see this please just do a quick search for Field Notes in google and read what the players are saying, please see that this content needs some updating to reflect the change in player count.