So if you hit 100% infected, can you still continue mutating down a path? Purifier still increases your infection level, so you could hit netherum ally, purify yourself to mutation-free while still being infected and mutate down another path?
Also, wouldn’t this make rushing for 100% infection one of the fastest ways to safely establish yourself, in an NPC-free game? Kill a few zombies and choke down as much tainted meat as possible without killing yourself, and once you hit 100% infection, you can wander around the rest of the zombie-infested city in relative safety?
I do like the idea of the stark gameplay change of becoming a netherum ally, although I’d like the monster factions to be a little more developed so you could progress from that to joining another monster faction.