Voldemort still killed David Monroe, he just did it earlier than everyone thought he did. Chapter 108:
I had long ago taken my vengeance on David Monroe - he was an annoyance from my year in Slytherin - so I bethought to also steal his identity, and wipe out his family to make myself heir of his House.
Your other questions remain, though. Harry no longer killed Voldemort for good, and Hermione (apparently) has. This should be interesting. I predict this becomes an issue, confidence 70%; and, conditional on that, that Draco sides with Hermione again at a crucial moment, confidence 85%.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 114, and also, as a special case due to the exceptionally close posting times, chapter 115.
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)