Lo-Fi Games

I like the new toughness feature. What would make it even better is if it also added stun reduction too.

IE: a higher toughness reduces your chances of being stunned in combat.

This makes sense considering that it allows people to survive blows that should knock them out, it should also let them ignore pain too.

That's why the KO limit becomes a negative value as your Toughness increases.
Its technically increasing the max health of all of your body parts therefore your character is becoming more resilient to all types of damage.