Thank you, I did find it interesting. @Fifth of Daybreak is actually my brother, and it is from him that I became convinced that autonomy is the author of the second letter. I wasn't aware of that thread (I haven't spent much time on the shard forums yet), so I find it funny that I ended up re-treading the same arguments that had already been hashed out.
I find it interesting how @Oversleep had taken the same passages that I had thought showed strong support for autonomy, and saw them as strong arguments against them. To me, this just shows how huge of a difference certain interpretations can make. When I read the second letter, I saw the use of "we" as more of a "royal we" than a "literal we". In other words, I saw the verbiage as more of an act to differentiate personas than as a literal split of minds. I can understand how it would be taken that way though, and, now that I've seen the arguments for ambition, I find it very plausible (if not for the confirmation that Patji is related to autonomy from last week's signing).