There aren't enough chapters, and didn't Harry say that it might take decades of work? In rationalist fiction there's no reason for all plot threads to come together at once.

We've got four chapters. Maybe one chapter dealing with what happens when Hermione wakes up, one for Draco dealing with the death of his father, one for McGonnigal giving a speech as the new Headmistress, and one for Harry considering his plans for the future.