You know if anyone has gained/learned anything from this case is to get it in writing.
Living wills are imperfect solutions because it is difficult to anticipate every possible scenario weighed against possible breakthrough treatments and to draw a line through possible grey areas.
A much better solution is to tell your spouse what you generally want and then to trust that person to make the judgement call for you. Well, that was a better solution before some conservatives decided that what God joins together the state can separate.