That was one gorgeous looking film. To touch on a bunch of points other people already have:
-The Three Brothers animation is fantastic. That's how you spice up exposition.
-Totally agree on how they've taken the dullest aspects of magic, like wand-waving and teleportation, and made them visceral and weighty, mainly through sound design.
-The Malfoys really did do a lot with nothing but appearance and demeanor. Bonham-Carter and Mulane too do much more with voice and body language than their lines merit. That's the benefit of filling all your walk-on roles with the best actors alive, I suppose.
-Grint shows the most improvement in this outing, but he's also absent for crucial stretches, and Watson does a phenomenal job of carrying the bulk of the film. She's been the most assured of the core performers for some time, and you really see how they "wouldn't last two days without her" even when she's not just doing the best spells.
-All of the little additions are improvements, like Hermione mind-wiping her parents and how it gave an emotional weight to the utterly perfunctory business of cleaning up after the cafe encounter. Or the slimy head snatcher. Or Neville's moment on the train. Or the way Hedwig's death both streamlines the logic of the scene and works better dramatically. Or how the evil of the necklace was portrayed. Yeah, I even liked the dance.
-The torture scene was awfully flat, on the other hand. No idea why they didn't have Ron going bigger.
-One thing that I thought was a no-brainer was that they would switch the wedding at the beginning to Lupin and Tonks's. Why bother introducing Bill Weasley so ham-fistedly this late in the game when you could be bulking up the attachment to some characters who have been totally sidelined, but whose resolution will be enormously important to Harry in the finale? If you just need a 7th person for that scene, just plop in Lee Jordan or Percy (whose subplot has been entirely dropped from the movies, but has appeared). Not sure what the thinking there is.
-Interesting that they didn't kill Wormtail at Malfoy Manor. Curious to see what alternate end they've come up with for him. I suppose it could just be that taking him out becomes one of the supporting character's hero moment at the Battle of Hogwarts, but maybe it's a bit weightier.
-As far as Horcruxes over Hallows as a potential end for this installment, I think the Hallows are introduced so late in the game that trying to hang the entire thematic conclusion on it wouldn't work. Not sure that not having a conclusion at all is better, but still.
-This is a problem carried over directly from the book, but the sidetrip to see snakelady adds absolutely nothing to the story but some superfluous wrinkles about replacing wands. There does need to be some kind of episode while Ron's gone in order for his return to have any impact, but it could've turned up some kind of info with story significance.
-At first I was surprised that Dumbledore's backstory was cut out of this one, even though the seeds (the book, that shoe-horned discussion at the wedding) of it are left in. But on reflection, it makes some sense. Since they go directly from the heist into the Hogwarts section, they will need to pad out the pre-heist section in order to have a proper first act. That's as good a place as any to highlight Harry's increasing misgivings about his mentor, not to mention some of the wand technicalities that will come to bear at the very end. I would love it if they just swiped the opening from The Two Towers whole and had Harry dreaming about the Dumbledore/Grindelwald duel pre-title sequence, but I'm not holding my breath.