I didn't mind the sacrifice. It felt ritually appropriate, and it outlined the way that Harry's attitude toward death gave him mastery over Voldemort, who broke himself to escape it. Also, I couldn't help but think back while I was reading that chapter to the story of the third brother, who "met Death, [and departed together] as equals." The ending was nothing if not foreshadowed . . .

I say all this because I agree with all of your other points; they bothered me while reading them. I didn't think about Snape and a bezoar, but I was bothered how quickly he went down; and Teh Unambiguously Eeevil Slytherin House has bugged me for several books now. :P

Also, the epilogue was nauseating. Well meant, but painful to read. I'm saying the rest of the book didn't make up for it, but . . . yeesh.