I think we all know he is working from an outline now, at best. He works the scenes artistically for his draft, outline, internal vision (As he removes the superfluous marble from his block to find his Aphrodite inside.). The actual narrative and dialogue follow. It makes no sense for the amount of translation time otherwise. This also allows him the time to make changes as well.
It is also a self imposed time crunch as he has a very minimal time to complete this and no real justification of process for any delays. If it was already written it would be done now, not over the last ten or so days of the update. Just imagine how this will play out as he goes to events.
GingerSweetGirl is spot on, IMO, for a disjointed result.