It always seems that the living story achievements are really what people are after, so they farm them like crazy for a week to a week and a half. After that, all you hear is the sound of crickets.
Which is why Arena net is attempting to resurrect it with upping the rewards, but I’m not sure it will work.
Of course this was evident even during the last few days of the event. When people hit FYGM they are off to do easier things or things that dangle new shinys in front of their faces.