Definitely a good start from one of the usual Points of Departure for AU's. Still, you've blended the ingredients in a different manner and I'm looking forward to seeing what develops. snicker It'd be amusing if Draco's heritage made him part of the Army, but only after Harry & Tracey were a very firm couple. I suspect the mix of Tracey and Harry will temper the worst aspects of both Houses in them and produce a very strong and powerful union.
From the description of Harry's state of incommunicado, it sounds like you've got a Manipulative!Albus to deal with as well as Tome; I do hope both most thoroughly receive their comeuppances.