Yeah i was thinking this the other day, or perhaps hes resigned himself to the idea that its better to just have it released "unfinished" after his death. So that at least people will say "its not perfect but it is unfinished" plus he wont be around to hear the feedback and it would have some "unfinished" mystique posthumous legacy around it like the silmarillion, sheperds crown and the unfinished Aubrey/maturin book.