Sorry for any confusion this may have caused!
Thanatophobia buff idea.
Make this similiar to the Leader perk, Affects all the survivors action speed like repairing, opening the exit gates, cleansing totems etc. except the healing action. This would force the survivors to heal first before doing any other action.
14/17/20/23 Tier 1
15/18/21/24 Tier 2
16/19/22/25 Tier 3