This is a mod that reduces the amount of force when the head is separated from the body. It is intended for use on a server, and it will only affect the head, as the limbs seem to be fine to me. It will not make the dismemberment any easier than normal. You can use another mod like Simple Dismemberment with this mod.

This mod works with anything that doesn't modify Creature_HumanMale.json or Creature_HumanFemale.json. Please note that the head may sometimes "stick" to the body when the NPC is on the verge of dying. It may then fall off after the death animation is complete.