Good but ending changed for worse

Rating: 9/10 (16 July 2011)

I was really looking forward to this movie. The final parts of the final book are epic and very satisfying. And for most of the movie was very good, until the end.
I understand when directors change things from the book for brevity. For instance in the book the diadem is destroyed by the fire in the Room of Requirement, but in the movie they just stab it rather than spending time explaining.
However, when they make scenes worse that could have fit in the 2hr time, that is not good.
I wanted to see Mrs. Weasley show some uncharacteristic fire in defeating Beatrix, as in the book, but the scene was brief and passion-less.
In the book, Neville got a "quest" from Harry to kill the snake. In the movie they tried to turn Neville's killing of the snake into something more exciting, but it seemed forced and just luck that he was in the right place at the right time.
In the book Harry battles Voldemort in front of everybody, circling, taunting and explaining who is the Master of the Elder Wand. In the movie, they battle alone and Voldemort seems to die inexplicably from no visible spell hitting him.
In an attempt to make the movie better, I think the director's changes made it worse, and it ruined it for me.