I think the authors of the books should have way more to do with the making of the movies, like in interview with a vampire and queen of the damned they totally slaughtered anne rices books, QOTD more then IWAV. QOTD was just tottally wrong and maybr incorperated two chapters of the actual book. IWAV was more just stupid mistakes like the hair color of the charachters[know that sounds stupid but its important in the books] and other little stuff. Point being if the authors had more to do with the making of the movies they would turn out better, J.K Rowling did have alot to do with the first movie, which I think stayed truest to the actual book I dont know if she had anything to do with the 2nd or 3rd.
Many have made a trade of delusions and false miracles,
deceiving the stupid multitude. -Leonardo Da Vinci