Noted, pardon my ignorance, and I did read Zig's post, but I think that makes a mountain of the molehill. Zigzag implies that a Pure route of the wayfort would be needed, but that's already a reality, since when you return from the Winter City and meet Farrah for the first time you can either banish her from the fort or make her promise presumably on pain of death not to spread her corruption.
After that you're firmly in control of who is and who isn't invited to the fort, and even if you do invite some questionable persons, like Sandre and Caera, and (there are plenty of reasons for a Pure Champ to do so, chiefly rounding up the less dangerous demons somewhere they can be kept under surveillance and won't do any damage until you find a way to restore them, per Lethice's purified end and Kasyrra's whole Raison d'être it can be done) you can enforce the same rule on them as Farrah, can you trust Demons to keep a promise? No, but you can trust they understand survival.
The only reason there has to be a divide in the first place is because Jael gets to the Wayfort before you do and lay down the law with Farrah and/or the Alraune and it irks me,
The initial pure/corrupt divergence isn't the problem, it's that the champ sends her to Garth, who is willing to lodge and employ her but is not pleased about it because his respectable tavern is beginning to look more like a whorehouse, Garth who you already owe a lot to, but instead of taking the headache off his hands once the Wayfort running and under control you just leave her there.