Well, I've been reading the rogue trader books, and have more than a few questions to ask.
Are there rules for improving the quality of the crew? If yes, how to do it?
Are there rules for more Xenos antagonists? Edge of the Abyss have a few more, but it only gives specific opponents for the main xenos races.
How do vehicle stats translates into space combat?
What would be good stats for an average Imperial Guard soldier? What would be a good rarity modifier (for an average world, with the possibility of being modified depending of where you are) for requisitioning an Imperial Guard regiment? What stat modifiers are good for change in quality in the requisitioning?
Similar question about the storm troopers. Edge of the Abyss have rules for requisitioning a small group of them. What would be the good stats for an average storm trooper? And what modifiers would be adequate for change in quality?