They are never going to implement it, but anyways..
I'd love new stats for food and hydration needs. It would have to be realistic though(as in not having to eat every 5 minutes. I HATE those games)
One meal per in game day would be fine. And you shouldn't starve to death if you haven't eaten in 3 days, but take some kind of penalty.
One week without food and you should be in trouble.
This could add some great immersion for those long exploration expeditions. Where you would have to use cargo space to stock up on food and drink before setting out.
(1 ton of food, and 2 tons of beverages should be enough for a whole year in the black

)