The epilogue made me furious but it also left so many gaping holes that I knew the fic would keep coming for years after the series was finished, so I suppose I should be grateful to Rowling for not putting a masterful ending on the whole thing that would have made fandom seem secondary to me (I never wanted to write Master and Commander fic after reading the books, for instance, because they were so blissfully perfect and satisfying).
I read "Ouroboros" when it was new, I'm pretty sure!