As AlexanderWales says, the biggest flaw is the wand. If you add a line about harry being left holding his wand so that Voldemort can impose further unbreakable vows if he sees fit, or he has it left in case he needs to demonstrate any secret knowledge (along the lines of Patronus 2.0), Voldemort goes from holding the Idiot Ball to just making a mistake. He's trading off Harry possibly doing something impossible with his wand vs a far likelier benefit.
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.)