Brilliant! Augusta is wonderfully IC, and Rufus is so three-dimensional. I love the political aspects of your story; the way Rufus tries to do a good job in an almost impossible world, where he is hindered by the good side as well as by the forces of evil.
He is the one who is acting like a rogue warlord, recruiting child soldiers for a private army to do his bidding One can quite see Rufus's point of view.
As though he should release a man who confessed under Veritaserum to Death Eater activity, for no reason other than Harry Potter liked him! Good point.
Unfortunately, however, that sometimes equated to not much in the intelligence department. Laughed out loud at this!
Then, as they used to say, nature took its course. Incredibly Augusta.
Malfoy had always been an arrogant, pretentious git, but that he was willing to waste time to satisfy his pretense of being civilized was an astounding indication of his vanity. Such an excellent observation!
Malfoy was a fool, but then again, Rufus thought with asperity, most people underestimated Hufflepuffs. And he a Hufflepuff. Great way of up-ending some of the House-cliches.
And I love the way Neville, loyal friend of Harry that he is, is annoyed by Rufus, yet accepts the marriage, simply because his Gran is so happy.