I think they should add a Hardcore mode like in Fallout. Then aside from health you would also have to worry about thirst, hunger, and fatigue. I think it would be pretty cool to find clean water sources and hunt for food along with everything else there is to do in the game.
Eh, this is Far Cry, not Minecraft or Fallout. It should be played as such. Don't get me wrong. I'm not dissing fatigue or hunger in games in general. I just think it should be confined to the appropriate games.
^ I partially agree, this game's main focus point is to strategize and ambush a seemingly overwhelming enemy base using the few tools at hand. With this being said, I wants me branch whips back, dammit!
Also, you don't have to necessarily "starve", but maybe you can have a "stamina" bar, like what was in MGS 3? You can have superb aiming with a full stomach, but as you get hungry your aiming will start to sway and you'll get fatigued quicker from sprinting. After your stamina has reached a low point, your stomach grumbles and nearby enemies will hear it and walk over to check it out.
"...and when there was no meat, we ate fowl and when there was no fowl, we ate crawdad and when there was no crawdad to be found, we ate sand. "