I don't know why some directors feel the need to change the movie adaption unecessarily. Also with this movie and the last there was no feeling for Dumbledore, I didn't care that he died or that he had to drink the potion.
Why did they make Snape look like a rock-star with flowing clean hair? Snape's intentions were too obvious as to what he did at the end.
Did the creators even read the book or just base the movie on a synopsis?