John Granger has pointed out that the Quidditch World Cup Final between Ireland and Bulgary, the most important match in the book, says something about the end of DH. Harry intuitively understands Krum's decision to catch the snitch, to 'end the match on his own terms', despite losing the match. This mirrors Harry's decision to accept his death, despite that he thinks that there is still one horcrux out there (Nagini).
Are there other 'mirrors' or 'miniaturizations of the plots' elsewhere in other Quidditch matches?
There also another 'miniaturization' going on in Goblet of Fire: in chapter 23, Ron and Harry play chess, while Hermione is watching. The story says "there were two brave pawns and a very violent bishop". You just miss this part, if you don't look with a certain eye on it, but it's the scene of the graveyard in small. It's a post-modern technique.