So you want historical accuracy... in alternate history? Despite the fact that the mere act of transporting an entire town back in time to the middle of the aforementioned war means that it cannot, in any way, play out the way it originally did?
I'm not sure how to comment on personalities of historical figures being changed. I don't know any historical figures, or what they're like as people. I haven't actually read the 163x series, though - alternate history that deviates due to time travel isn't as interesting to me as the kind that deviates due to a small change.
Anyway.. finished I Am Not A Serial Killer a few days ago, and last night finished Servant Of A Dark God, which I put off for a while due to other books capturing my interest. SoaDG was good though, despite my earlier problems with John Brown's writing style, and I look forward to the next book in the trilogy.
Currently reading Scott Lynch's The Lies of Locke Lamora, which is possibly the best alliterative title ever, finishing up The Affinity Bridge, and considering starting a re-read of The Name of the Wind. Also meandering my way through Dawnthief by James Barclay and Elements of Fiction Writing: Characters & Viewpoint by Orson Scott Card.