I think that Monsters should respawn. I don´t like to go through a world without any Living Creatures in it. If you ever played Gothic/Risen you know what I mean. Monsters and Bandits should respawn after a couple of days/weeks. And they should give XP. when you´re a good Player than it´s ok, but new Players may will have problems with some Bosses and when they have Difficulty problems then they can level up a bit and try again. Thats an essential part of RPGs in my Opinion: to have the opportunity to level up your character when you have the feeling the enemies are to strong.
