So, I am a newly minted Rogue Trader, leaving for the Expanse with my ship, my crew, and my ambitions for wealth to make Aladdin shiver in awe. I screw around in the Koronus area for a time, rack up some money, some allies, and some enemies, and then, for whatever reason, I decide that I am a bit bored of the Koronus Expanse (perhaps I am mildly stupid, or maybe this one enemy is bigger than I like). Can I go other places, or does the Warrant specify a region of conquest (the Koronus Expanse, for instance)? Say in my travels, I heard that there is this relic out in the Maw, and that it leads to another part of the galaxy, where the Imperium is fighting another Crusade; if I were a military and patriotism-minded RT, could I persuade my way past Admiral Horne and Metis Base, and go do my RT thing in the Reach, with the Warrant I already have, or is it only good for the region of space I start in; the Koronus Expanse? It seems it should be a "go anywhere" card, but for the purposes of the game, they might want to keep you in the supported area, I don't know. It would seem that a few Rt-minded individuals could go far, and do well in the Reach, and the Jericho forces could benefit from some Rogue Traders, too, being stretched a bit thin. I could see less loyal individuals harvesting Nids, or their shells, maybe doing some illicit dealings with the Tau, or whatever, but the "good guys" among the Rogues could be a great asset, though I know that traffic through the J-M Gate is strongly restricted, and even most of the battling soldiery don't know where they really are.
Could the Reach be a good, higher-end threat zone for a party of Rogue Trader + Crew? Would it be a reasonable "next destination" for when the end of RT is looming in the horizon?