I seriously cannot find a flaw in Batman Year One. IMO is the best Batman story ever told and Miller's true masterpiece. Grant Morrison is an extremely smart man with many life experiences that incorporates into his writing and these experiences have helped him understand these imaginary characters better than anyone else. I haven't seen such connection in a writer and his characters, except maybe Jamie Delano's Hellblazer where the writing flew so naturally he wasn't even trying to be good.
Jeph Loeb had a great voice for Batman and i can't blame him for losing his mind, the man lost his son. Everything else is unimportant. Let him be. Although his Nova series isn't half bad imo.