Like everyone else said. The problem with the Harry Potter movies was not too much filler, but NOT ENOUGH filler.
There is a very good reason why it's the most fanfictioned IP in history. Harry Potter was never really about the Star Wars-style Hero's Journey thing the way the movies tried to present it, but about relationships, character dynamics, and a magical version of school life.
I don't want to more about the history of the Hallows, or whatever, but more about Pavati Patil's and Lawender Brown's friendship, about how Marietta Edgecombe is dealing with her face spelling "sneak", about the Weasley twins and Lee Jordan being awesome, about Dolores Umbridge being awful, about the trio sneaking down to Hagrid's hut on a winter afternoon for a butterbeer or something, and more about Luna Lovegood being adorable.
There is a very good reason why it's the most fanfictioned IP in history. Harry Potter was never really about the Star Wars-style Hero's Journey thing the way the movies tried to present it, but about relationships, character dynamics, and a magical version of school life.
I don't want to more about the history of the Hallows, or whatever, but more about Pavati Patil's and Lawender Brown's friendship, about how Marietta Edgecombe is dealing with her face spelling "sneak", about the Weasley twins and Lee Jordan being awesome, about Dolores Umbridge being awful, about the trio sneaking down to Hagrid's hut on a winter afternoon for a butterbeer or something, and more about Luna Lovegood being adorable.