Things I liked:
1. Bathilda Bagshot. The scariest scene Rowling has ever written.
2. More focus on the trio and their adventures. I loved the first half of the book.
3. More focus on the politics and how Voldemort was manipulating the wizarding community into a sort of pureblood fascism.
4. "Crush-on-Lily"-Snape turned out to be right!
5. And so did Harrycrux.
Things I disliked:
1. The epilogue. It was like really bad fanfiction, and didn't tell us what happened to all the other characters. It should have been in a narrator's voice (just like book 1 began) and told us what happened to EVERYONE - or, c'mon, at least the Weasleys, Luna, Neville, Hagrid, McGonagall, Kingsley, the Dursleys, etc.
2. The Dumbledore subplot. I was expecting something to do with switched/mistaken identities which has been a theme in ALL the books but it turned out Rita Skeeter was just... right? I don't like how Rowling tore down DD for no reason.
3. Things we thought were mysteries (such as the two accounts of the eavesdropper contradicting, or the missing 24 hours) turned out to be writing mistakes and will never be explained.
4. Things we thought were big mysteries (WHY are Lily's eyes so important) turned out to be small and obvious mysteries.
5. Snape was good all along. Sorry, I was totally ready for a redemption scene, but not for Albus Dumbledore to ask someone to tear their soul with murder as a favor. That is an absolute contradiction of canon Dumbledore views on death and murder. Also, the explanation of Snape's goodness (both the scenes themselves, and the decision to have it be told thru pensieve) were fumbled a bit.
6. There was no "big mystery" behind Harry's survival after all, not more than we were told way back in book 5 anyway. Instead we got this random Hallows plot the only point of which was to hand Harry an unbeatable wand so he could kill Voldy.
7. Voldemort was really dumb. Like, "Hide my Horcrux in a room that's clearly filled with junk other students dumped there yet which I think only I even know about" dumb.
8. The way Wormtail figured into the story was just pathetic.
All in all I think Rowling did best in books 3 and 4 and then something went badly wrong. Her books are mysteries first and foremost. The books where she wrote actual plots with twists and revelations - like Pettigrew being the secret keeper and Barty Crouch's escapades with Winky (and to a certain degree, the Ginny/basilisk thing) - are the best. Books 5 and 6 had no such twist, and book 7 was just strange in a Matrix:Revolutions-y "He killed the other dude but you're never going to really understand why (but here, watch this inexplicable train station scene, it will explain everything)" way.
I have no clue why she'd feel this way, but it really felt to me as if about halfway through Order of the Phoenix, she wanted to have nothing to do with HP ever again and started going autopilot.
Still, I'm gonna read the whole thing again
