Holy Necroed thread batman.
I think sleep healing is too fast even with slow healer.
I could see a small amount of regen during non strenuous activities, the human body doesn’t really stop healing with out drastic reason as far as I know. Things like eating, reading, walking. I think crafting and construction would be too much activity to get any meaningful healing.
But to be honest I am one of those that likes long games and doesn’t mind being cooped up in the base for a week because a horde ripped me to shreds. It gives the game a sense of danger to know that if I try something risky there will be consequences.
Though TBH I am in favor of killing a regen system and putting in a more robust wounds and medical system even though I don’t quite know what it would look like.