As for The Big Change, I think Snyder et al made the right call; the movie already runs nearly three hours without all the exposition the book’s ending would have required, and frankly, there was a real danger that it would have looked stupid, and the non-fan audience would have been too busy laughing to follow what happens afterward, or to care.
So, as of now, I am pleased and impressed; the missteps were outweighed by what they got right and the grace notes they added (my favorite detail was the muzak version of “Everybody Wants to Rule the World”). Above all, I found the movie thought-provoking; on that score, at least, Alan Moore should be pleased.
(PS—I really want an animated Rorschach icon.)