I didn't really care for DH Part 1 and yes I've read all the books.
I don't really have any new criticism that hasn't already been leveled at the movie though. It was just too slow, for me.
Also, what action there was just didn't seem that compelling. I was hoping the raid on the ministry would come off as more of a heist. With the three kids FINALLY using planning/brains/skill to successfully complete their task, instead of lucking their way through it like usual. But no, they still fumbled around and stumbled into success, like usual.
I also don't think Hedwig's death was handled with any kind of care. Harry didn't even seem upset.
One positive thing is that I LOVED seeing more of how this Wizard war is spilling over into the muggle world. I love seeing the muggle world in HP in general. The diner scene with harry making eyes at the black waitress in HBP was great, too.
I think they had a missed opportunity there with Ron, though. I thought they could have spent ~5 minutes playing up Ron being a fish out of water. A nice role reversal from Harry, who is usually the one that has no idea what is going on. I would have liked him to order some wizard drink or something.
Anyway, it wasn't awful. I think it was BEAUTIFULLY shot. I don't know who was DP set designer or location scout, but all three deserve awards. It's a gorgeous movie to look at. I just found it to be too plodding. You can show desperation and you can show the slow passage of time without *actually* taking 40+ minutes to do so. Could have had a camping montage showing the seasons change, or something.