The thing about the duty recorder is that its purpose is to review complex moments in difficult content to understand how the party's choreography needs to be adjusted to handle mechanics better. The value of it for that purpose drops significantly once a piece of difficult content has been out long enough for standardized strats to emerge and choreography needs only minor tweaks that can be made without a play-by-play review. Since it doesn't have any value for that purpose in duties like dungeons, it may be hard to justify the amount of data that needs to be stored to handle all the enemies, NPCs, and objects in a dungeon. And that's to say nothing of the ease with which such detailed data could be used for illicit purposes such as reverse engineering a dungeon. I really don't see the duty recorder ever becoming more than what it already is.