Wait, does that mean we're located in the eastern fringes?
*Shrug* Who knows? Warp Travel is fucky, even before Chaos gets involved.
Also, to weigh in on the Mutant/Corruption Debate with WoG's for this quest:
1. Chaos Corruption Is Not Static.
You can be corrupted by viewing Daemons, or being in the presence of Chaos for too long, but so too can you undo that corruption by being within a holy place and praying, or being within a community that supports you and gives you purpose. You can literally be a slave to Chaos, and a result of a Chaos process, and still have faith in the Emperor without falling to Chaos. Daemoncubula, for all that it is hyped up as The Most Disturbing Thing Ever has a village of rejects and slaves who pray to Big E. Those people are getting a constant buff against corruption because of their community.
2. Visible Mutations Are Far More Benign Than Soul Corruption.
Having a tentacle only means that Chaos has one more hook in you, but not that you are
inherently more likely to fall. If you have access to the options in 1, you can deny those hooks and pull. But it means that unlike those who fall in mind, you are far less likely to get the opportunity to negate the hooks. But if you get corrupted in Soul? That's the 9/10th that fucks you over harder than a Slaaneshi Daemon.
3. The Imperium Is Literally Taking The Worst Options As Default Because That Is The Setting.
Like, this isn't even up to debate. The Imperium has no problem genociding loyal planets because they think those people saw too much. They have frequent civil wars because of stupid shit. You literally needed the Space Wolves to throw down against the Inquisition to get Daemons acknowledged beyond secret circles as real. Take every fascist, communist, theocratic, oligarchic, autocratic, and other ists and tics, take the worst parts, put them together, and you have the Imperium. That is the setting. Everyone is evil, we are just choosing the flavor we like to play as. You just happened to choose the flavor that likes to violently shit down the throat of everyone else for not working to make a better galaxy free of the ugly shit.