Health and hunger limitations may not need to apply with easy difficulty, though normal should have you respawning with half health and half hunger, except when you died with more than half of your hunger filled.
Hard would have a minimum of three hearts but hunger carried over would either have six hunger points filled or does not have a minimum limit.
In any case, this having a chance to be implemented is small if nonexistent. I guess I would like more reprocussions to be had on minecrafters that don't care to save their enchantment level. With the update of 1.3 being close to finnished, it would just be super easy to buy bottles o' enchanting and get all the levels back or make it beyond what they died with, or just be respawned with full health and hunger altogether.
Since the changes to enchantments has been made in the snapshots and that it will become easier to get skill points for said enchantments, I thought that reprocussions can be levied to be made on the health and hunger system based on difficulty.