Actually, Harry Potter and the Order of the Pheonix didn;t have that much cut out. Minor things, maybe, but they kept true to the book. The biggest thing they messed up, is really Professor Umbridge, another thing is the Dementers, they kinda just slapped them in there. The movie that did have a lot cut out was the fourth one, Goblet of Fire. It had so much cut out, it was revolting!