However, it seems to me that the most obvious way for Eliezer to continue with the plotline is to simply make Sirius actually be a traitor, and Peter actually be a hero. This would wrap up several previously mentioned discrepancies (e.g. Scabber's death), and also preserve his ability to spring a surprise twist on everybody even though we already know what occurred in canon.
This is what Eliezer has already done (in the early chapters). If Eliezer switched it up and made Sirius not the traitor it would undermine two of Eliezer's morals: "Conspiracy Theories, paranoia and schizophrenia" and "Courage isn't about being too awesome to need to be scared, it's about doing stuff even when you do have reason to be scared".
"Courage isn't about being too awesome to need to be scared, it's about doing stuff even when you do have reason to be scared".
In canon, it was precisely Peter's fear (greater than that of his friends) which led him to join Voldemort. So while I wouldn't like to see Sirius made into a bad guy (since I side with wrongfully convicted prisoners and don't want them to turn out to be guilty after all), it would be a powerful statement in favour of the power to overcome one's fears if Peter stayed a good guy.
ETA: There is now a third thread, so send new comments there.
Since the first thread has exceeded 500 comments, it seems time for a new one, with Eliezer's just-posted Chapter 33 & 34 to kick things off.
From previous post: