signoftheserpent said:
How do you define 'more important'? Criteria for importance vary from individual to individual.
First things first, releases to date, Rogue Trader is following the pattern established by Dark Heresy - first release post-rulebook is the GM's Toolkit (relatively quick and easy to produce in terms of written content), followed by a multi-adventure book (useful for many people, even if you and I happen to not be amongst them).
Secondly, Lure of the Expanse provided a little of everything in its content - a few adversaries (Eldar, including a starship; several rival Rogue Traders), examples of how to use the Endeavours system to its fullest (something that I've heard a lot of call for in places other than this forum) including a number of endeavours that can be detached from the main plot and used stand-alone with little difficulty, and detailed information on nearly half a dozen locations within the Koronus Expanse. It isn't as if the book can only be used as a single short campaign...
I hope to still be an active and avid gamer in the years to come, and tip my hat to you and your experience. Bravo.