SPOILER ALERT:
I enjoyed the movie. The omissions and changes that irritate me are the ones that change important sub plots.
There was supposed to be a wizard battle in Hogwarts, between the dark wizards and Dumbledore’s Amry, summoned by Harry with the coin, though only a handful show up (Luna, Ginnie, Neville, Ron, Hermione, I think). It’s a bummer we didn’t see that.
We also completed missed that there is a new Minister of Magic, and that Harry is already on-the-outs with he new minister.
Most importantly, plotwise, to me, on the omission of #12 Grimwald (and “Creature”) belonging to Harry. This affects the main plot line of the horcruxes, the fake locket, the real locket and R.A.B.
My “guess” is that the funeral for Dumbledore will happend at the beginning of the next movie.
Oh, yeah... It’s be hard to start #7 where it normally would, at the Burrough during Bill and Fleur’s wedding, on account of they blew up the Burrough and have completely skipped Bill and Fleur altogether so far.
It doesn’t make sense for the powerful protections around the burrough to fail because of the fall of the Ministry, if it never really had any protection at all.
Nonetheless, I really enjoyed the movie.
I am also very academically interested in what completely fabricated non-Rowling story inventions they will have to concoct in order to repair the violated plotlines. Arguably, the only one that -must- be repaired is #12 Grimwald and Creature. However, the transition to the fall of the Minsitry will have to be changed a bit.
Harry now knows the basic concept of what a horcrux is, and he knows there are probably 7 of them. That's it. The idea that Tom Riddle is obsessed with artifacts of the great people of the wizarding world has been lost. In the book, Harry suggests that a horcrux could be an old boot (like a portkey) but Dumbledore explains that it is far more likely to an object of great significance. Well, all of that got left out of the Half-Blood Prince (film) and so Harry has no reason not to go off looking for old boots.
But I'm sure they've figured out some way to tell the story in the next movie.
I’m guessing that #12 was omitted because it will play such a large part in the next movie, as will Kreachure (sp?).
In the last scene, I thought I saw some of Dumbledore’s Army clustered in the shadows at the base of the stairs, but it went by too fast for me to be certain.
The movie set it up for a more detailed explanation of the locket and RAB in the next film (which is where I remembered the explanation occurred in the book?).
And I thought Fenris Greyback was PERFECT: perfectly dreadful and menacing. I was also glad they didn’t hex Professor McGonagal (sp?), since she is looking pretty frail even without the wizard attack.
I believe Grimwald and Kreature are in the next book.