That being said, I also never quite understood why Black Industries opted for an Inquisitorial cell without an Inquisitor back then. Sure, it's one way to pull it off, but it doesn't exactly meet expectations when someone comes in having read about the Inquisition from all those other sources, does it? The "low start" always seemed a bit weird - it's like a game of Rogue Trader where the players start out as crewmen!
Probably because an inquisitor has too much political and financial power, he could even declare the destruction of an entire planet in less than an hour.
And I think that Dark Heresy, in the end, is the most clearly focused game of the line, the part written by the BI at least.
For example, I think that the archetypal character of Rogue Trader is Han Solo, a wrong choice to me, the tipical character of Rogue Trader should be Sir Francis Drake, a man who commanded many sailors, not a man with only an hairy friend!
And I think sometimes that FFG is too much bounded to the Codex, instead of Black Industries which were more "free".