YEah its a kick in the balls when you simply run out of steam on a story.
Still a satisfactory end. And I'm a-Hermione's only for Harry-man so this is about as good as it gets there!
Queen Consort is good here though I would think the four would have kept closer touch even with the rebuilding of Society and technology!
BTE would William and Hermione's children be magical as are Harry's?
Might be a start of a new magical race within the new society. Though it would take generations til that would be acceptible!