I think the movie could have embellished Snape's memory as well as the Order of the Phoenix cast. They only showed ONE meeting...and we hardly get to get a taste of nyphedora and Kingsley...how much more developed they were in the book. Also, Umbridge in my opinion is TERRIBLE in the movie. Her voice is very irretating and should be a lot lower according to the book (she is supposed to resemble a toad).