I think the whole point of opening the recording process to fans through social media is not having to release a making of documentary for this album. They didn't do a making of for The Hunting Party and people never shut up about it.
While I agree that this last update was kind of useless, they have already given us a lot about this album. We know their approach for creating the songs, we know who they're collaborating with, we got a few sneak peeks of elements of new songs, we even got a 360° studio tour video. For previous albums, we wouldn't know anything at all until after it was released.
What I see a lot of people saying is that these are not real updates because they don't give us new music.
The band has spoken many times about how playing and releasing Qwerty was a mistake because it gave the fans a wrong idea of what Minutes To Midnight would sound like and they wouldn't make that mistake again.