6.1.2 is awful. Don't release it as-is.
The Thanatophobia change is egregious. People were complaining about Legion and Plague taking advantage of it since it synergizes with their powers, and they'll be only ones still able to use it after the nerf; it'll be utterly useless on every other killer, since very, very few of them can keep 4 survivors injured for longer than a few seconds.
Thus, the answer is simple: just nerf Thana back to 5% per survivor, to a maximum of 20%. If everyone is so mad about its previous buff, just revert it and give us the old Thana that nobody had any issue with.
The Mettle of Man change is just... no. Do not. It was already bad and this just makes it worse.
Dead Man's Switch is a niche pick that isn't very good on most killers, why on earth would you nerf it? Because of Pain Resonance? ######### that, just keep the PR nerf that caused it to not cause generators to explode. The Merciless Storm interaction is so rare that it doesn't even matter, especially since failing the skillcheck only causes it to be blocked for 20 seconds. It's not the end of the world.
Comments
A technical point, but actually because the gens now take 90 seconds to complete if you wanted to revert full 4 token Thanatophobia to make gens take the same amount of time solo now as they did prepatch (i.e. 100 seconds) if I get gen calculation right you would have to make the maximum Thanatophobia penalty be 10% (i.e. 90/(1-0.1) = 100 seconds = 80/(1-0.2))