Several alternative career ranks from Hostile Acquisitions seems to imply they can be taken by xenos characters, which doesn't make sense to me (an ork Sesessionist? a kroot cold trader? an ork swashbuckler?... Doesn't sound solid, setting-wise).
I think that is just a difference between two writers, one that took into consideration xenos and other who just tough it was a human-only book.
What do you think?
race, I also might have appreciated a bit of them there, since a Rogue Trader could easily ally with them, and get access to their cool stuff, or fake it. They could deceive either side (the Imperium or the Tau) with a minimum of fuss, and keep running as a Rogue Trader, with Tau-ship stuff, regardless of who their true loyalty belongs to. Having Tau on a ship is almost as believable as Kroot, and certainly more than an Ork (to me).