There is one element to Windhooks story I find contrived.
Door opens - assassin enters - guard kills assassin - announcement that Strephon has been assassinated - Lucan immediately improvises the plan to calmly kill everyone in the room - Windhook escapes while Lucan is murdering the others. Can anyone else see a flaw in this version of events?
It's a stretch but not insurmountable. From Strephon's diary we know that Lucan was always the pale half of the brothers. Maybe he nursed resentment and concocted fanciful ideas for years which never were acted on since he was a coward/loved his brother/insert any reason.
Then, all of a sudden, the opportunity falls in his lap... he might move really fast with his lizard brain and then realize he needs to come up with a plan quickly. It's a poor plan and allows Windhoek to escape but keeps folks running around just enough to get Dulinor off Capital and get him on the Throne.
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On a sidenote, why not BE Windhoek in the adventure? That's a campaign worth investing time in... Windhoek and his friends trying to escape/bring the truth to others. Maybe change the course of the Rebellion itself.
Windhoek manages to convince a Marine sergeant who promises to escort him to safety to tell his story but things go pear-shaped and they need to hop on a (free trader/Scout) to escape. Now we have agents, marines and ship crew as PC's.
-Where does he run to? A sympathetic Noble?
-Is the reason the Moot is convened before dismantling? The noble calls for the Moot... Lucan discovers the noble has Windhoek to give testimony. Loyalist Marines attack noble's estate, seat-of-the-pants escape from estate/system.
-Where to next?
-Eventually he'll hear of Margaret's faction and try to reach it as she represents the "stock" Imperium...
Regardless, I like it.