The fact that they didn't include the tomb is a HUGE mistake, because now, in the seventh movie, when Voldie goes to get the Elder wand, it's gonna look all wrong (what, he just strolls into the Hogwarts grounds, happens to come across a tomb, and knows that Dumbledore is buried with his wand?!)

Also-waitress scene. HELLO?! WTF was THAT?! And where are the DURSLEYS?! I miss them...

A small thing that was taken out, but would have been nice to see- when Harry is in DADA, and Snape asks Harry a question, and Harry answers, "Yes". Snape Goes "Yes, SIR". Harry's response: "There's no need to call me SIR, Professor." Killer scene in the book. Would have loved for it to be in the movie.

But what I loved about the 6th movie? ALL the R/Hr scens (lots of emotion, Emma and Rupert really have great chemistry). Whrn Harry takes the Felix Felicis, and goes to Aragog's funeral. Slughorn: "Harry!" Harry: "Siiir!"
Another great scene was when Ron drinks the Love Potion, and is just sitting by the window, and then randomly goes, "It's beautiful, isn't it? The Moon." "Divine..."
And when Ron is in Slughorn's office, and falls off the couch. That was hilarious.
Also, in the Burrow, when Ginny goes, "Mum, when did Harry get here?" And Molly goes, "Harry? Harry who?"

Overall, great performances, and this is one of the best movies in the franchise so far!