This is very disappointing. I wasn't really following PTR and kinda just assumed mutated events were gonna have two mutations. One mutation is not gonna make a difference for people who wanted a challenge and it's just gonna annoy those who didn't want it. It's a middle of the road update that's not gonna satisfy anyone.
I'm guessing they excluded RR and PP from the event list because mutations would've killed scavengers/creatures too fast. It would've been a nice challenge to keep them alive against poison, freeze, or explosions.
👀 Stay tuned!