One and two didn't change much. Three and four changed quite a bit and I did bitch and moan about them. Five was by far the worst with changing shit. I really didn't want to go to the movies. The woman wanted to see it. I said fuck it and took her since she wanted to see it so badly.
well first of all, Movies 1 & 2 were the absolute worst movies of the series. poorly put together, crap acting (which i personally blame on the director), and they did change a few key points of those movies.
Second, you knew the 3rd and 4th movies changed, and they were very significant in their changes, so why would you expect anything more from the 5th movie? Yes they took out ALOT of sutff, but that book hasa slot of information and storyline. and As I said above for entertainment purposes and so as to not have to give every member of the audience a complimentary bed-pan for it being so damn long.
In all honesty it comes down to this: if you are so Die-hard about the storyline, don't see the movies. I understand having to take the woman to go see it, because I dragged my boyfriend with me yesterday. there are too many theories and avenues the books go down, directly and indirectly.. a lot of underlying story that isnt addressed in a direct manor.
the movies are and should be treated as sepereate entities from the books, JK Rowling writes the screenplays, and I think she knows her stories quite well.. she leaves out what she feels can be left out and changes what she needs to to make up for it.