Unless you are heavily into the JK Rowling plot, the SFX is becoming tiresome. In the earlier films, you were entertained even though you may not have been familiar with the intricities of the story. The eye candy held your attention. Now that we have seen the "magic", the story has to carry the day. For those of us who have not taken the time to read Rowling's tomes, the convoluted plots are difficult to follow especially considering the character's accents.
We will wait for the DVD on the final episode, do a little homework on the story and hope to be able to appreciate the conclusion.