Boo. Those suggestions are from D&D, and weren't very original or interesting even there. They aren't Dwarf-Fortress like. The four-elements system is overplayed, and isn't very Dwarf Fortress-ish. If you're going to use a silly classical element system, why not use the five
Wu Xing elements instead, or some other
ancient belief that hasn't been so horribly, pathetically overplayed?
The law-order axis is even sillier. Where has Dwarf Fortress referred to law and order as rigid supernatural concepts? There is a sort of 'good' and 'evil', but it's expressed more as the difference between calmness and terror... it doesn't exactly fit on the D&D axis system.
Heaven and Hell make no sense at all. They're from a belief system that doesn't have anything to do with Dwarf Fortress at all.
...er, I don't mean to be too harsh. But I think we should wait until Dwarf Fortress actually has a magic system and a system of metaphysics before we start trying to think up what its metaphysical planes should be. Otherwise you end up just copying the metaphysics of D&D and Final Fantasy and so forth... which is what you did.
[ December 21, 2007: Message edited by: Aquillion ]