The Doctor Add-on Idea
I'm not saying it's balanced, i just like thinking of ideas.
As soon as a Survivor goes into Madness 3, all afflictions will be removed and the afflictions Madness 3 adds (can't repair, scream regularly etc.) won't be added.
However, the Survivor will now suffer from the Exposed Status Effect.
Maybe also remove the 2 second stun if they're hit by the Shock Therapy attack while in Madness 3, idk about that.

Comments
I like the concept, but it might need some adjustments to be balanced.