I wish they had shown the train scene at the beginning with GINNY introducing Luna, and Neville's plant spewing all over them.
I wish they had shown the Harry/Twins/Draco fight and the Quiddich ban.
I wish they had shown RON seeing the words on Harry's hand and not Hermione!
I wish they had shown St Mungos and Neville's parents.
I wish they had shown Harry worried about being possessed leading to Ginny saying "Lucky you!"
I wish they had shown Cho actually crying over Cedric, and asking Harry about Cedric's last words.
I wish they had cast Marietta and used her as the traitor, leading to Cho/Harry finally falling apart.
I wish they had included Harry/Ginny and the "chocolate in the Library"
I wish they had included Luna talking about Snorcaks, and her Conspiracy theories.
I wish Voldemort had said to Dumbledore, whilst possessing Harry, "If you want to kill me, kill the boy"
I wish the prophecy had been complete.
I wish Harry had trashed Dumbledore's office.
I wish we had heard about "Ginny catching the Snitch from under Chang's nose"