Pain Resonance change, which still makes it useful and rewards killer for not tunneling.
So the current PTB state of Pain Res, gives you 4 Stacks and adds 15% regress for the gen with the most progress, also u need to hook every surv individually for it to work, unfortunately 60% regress is nothing, which will make it a dead Perk. Because u need to get every Surv once which can be hard, u only get 4 Stacks…