Intersting. This gets me thinking... Whoever Thomas could have let in would have to be someone that doesn't care about a WCV living with Harry or flat out knows their relationship. It also inspires some other thoughts that if expressed, I fear could lead to derailment. I'd rather hear more opinions like this one first.
Ooh, good point.
Jim didn't write the DFRPG, he just read over it and told them things like, "You can't use that, I won't be revealing it until much later in the series." However, seeing their writeup might have motivated him to flesh out the points for your #2.
While it's true that Jim didn't "write" the DFRPG, he answered a LOT of questions for the team, clarifying points that were unclear or thusfar undefined. A LOT. STAGGERING amounts of text. He also provided a lot of answers to questions they
didn't ask, providing huge, wonderful insights into the Dresdenverse. (Good lord, how I wish I could see all that correspondence! And all the future developments Chad figured out from text alone that Jim made him remove from the published version! Covet!) I think the DFRPG provided an excellent catalyst for him to solidify concepts in his mind he may not have taken the time to complete worked out.
Still, Jim is pretty good at keeping his books lean and relevant. If something isn't necessary for a book, why put it there? The Doylist argument of "He just figured this out and wanted to show it off" doesn't hold up to me. I don't think he'd contrive to include a "this is how time travel works" treatise in PG if time travel wasn't crucial to the events of that novel.
Also, while I know the DFRPG was in progress at the time Jim was writing
Proven Guilty, I don't know how actively Jim was contributing at the time. I didn't become a beta until just after
White Night was published, so my Behind The Scenes-foo was weaker.
Since Iago says he has been sitting on the spoiler for the event at the conclusion of Changes since before the books were published, I get the idea that he was probably privy to Jim's original notes on the series that he wrote during his "writing a series" class. However Iago didn't do most of the writing for the books.
Nah, Jim just likes tormenting those close to him.
He told me the first line of "Changes" over a burger at New York Comic Con two years before the book came out, because he wanted to see my flailing reaction. XD While Fred is certainly the non-Butcher person who knows the most about what's going to happen in future books (unless it's Debbie Chester), I don't think it was because Jim let him see his notes. I think it was because Jim had to share his evil genius plan with
someone.