I’d like to do something I rarely do and change a grade to a film I reviewed weeks ago. I still run “Werckmeister Harmonies” over in my mind, so that ipso facto means it deserves higher praise than the “B-” I gave it on April 25. I’ve only done this once before, when I publicly apologized for my initial dismissal of “Gods and Monsters,” which I now recognize to be one of the great small films of all time.