Basically, hardcore reaslism, u wouldn't see in 3rd person, u wouldn't see a health bar in the corner of ur eye, you wouldn't see ur ammo, how much damage ur shield or horse has taken, no banners above team mates heads, no aimer for archery and hits to the head, depending on what helmet you have, are likely to cause ALOT of damage, especially from blunt and piercing weapons. For the spec camera, you have to restrict it as much as possible.
THATS hardcore, not just changing weapons and armour stats about