I seem to recall the art was done a long time ago but then at some point the bar went back down? I think somebody said it was because as they were doing some of the rigging they realized stuff was not at the level where it needed to be and so they had to redo stuff?
Pretty close. They realized that a large part of the art was borked/missing/poorly tagged due to DC being shit at organization, so they had to spend an ungodly amount of time re-exporting and fixing it. I believe the current remaining art tasks are slightly more mundane, like missing shadows and other tiny errors, and they keep finding new ones as the posing crew works through the backlog.
God only knows why it should take this long, though. We had this information months ago, and there's only so many art assets in the game. At some point one has to wonder why DC is jerking around with wallpapers and new location backgrounds that we won't see for years when there's remaining art tasks on the docket.