Something I quite enjoyed about this story was the time spent on Beauxbaton's being advanced compared to Hogwarts. Lots of other authors have realized that about half of Hogwart's core subject instructors are a joke, one ("30 minutes") going rather a long way with this. But where several authors talk of a brain drain - Muggleborns moving to America to get good work free of pureblood bias - you've worked through the implications of crappy education on transferring out or emigrating post graduation.
Other bits in the story should have gone somewhere but didn't. The owl-post portkey for example. Good writing, I enjoyed the scene. The only later reference is when Tonks brought her second summons, but scanning that summons before Harry reading it didn't turn out to change anything. No, the portkey could have resulted in some kind of diplomatic incident. The charms shouldn't have been removed until French aurors called, etc, and potentially better experts called in to figure out who placed the charms. This would have turned up the heat on Fumbles and the British ministry.
In my review of chapter 1, I said something about Harry being too passive. Well again, when the official ministry mouthpiece (our good old Daily Profit) printed such a biased report of Harry's refusal to come back to fight Moldy, I could have seen Harry or Sirius publishing the longer version of the reason. I guess this wasn't needed, but if Harry is suggesting that the British wizarding public need to step up and clean up their own mess, he could at least tell them. And I think he would.
I agree with a number of other reviewers, the ending was more than a little abrupt. If the characters realized Harry's involvement in Moldy's death, they discussed it so quickly I musta blinked. Dumbles' death, while highly satisfying personally, didn't seem very relevant to the story, apart from possibly getting the Elder wand making ol' Moldy confident enough to take on the Ministry. And did I miss all the horcruxes being destroyed?
With the abruptness, somehow I get the sense the author just wanted done with this one. No matter, it was fun. Thanks for writing.