I don't particularly like it, . . .
. . . but I am not certain what a good replacement for it would be. Perhaps a five point system, going back to something akin to alignments of "NG (CG)", or maybe the allegiance system I've heard of in d20 Modern (ie: devoted to this or that organization, nation, ethnic group, religion instead of towards an ethic / moral alignment pattern), or perhaps even the Force / Dark point system in SW RPG might work. I tend to often ignore it entirely, I admit. The characters are what the players think they are, and whatever alignment they have is immaterial to the current quest, etc.
WarlockLord said:
What I mean is: should good & evil be metaphysical absolutes, backed by an array of otherworldly powers, or not?
Not necessarily. It depends on the cosmology of the setting, I think.
On the other hand, I can easily see a group of mostly Good and Lawful leaning characters dealing with an CG Eladrin as a BBEG. In this instance each seeks to do what is best, but the chaotic eladrin seeks to accomplish its goals in a such a way that the party composed of mostly NG and LG characters (perhaps with a LN &/or NN fellow in the mix, but no chaotics) see as too dangerous, hostile to the present environment / situation, or even callous to accept. They may or may not realize that their ultimate foe is a paragon of Good (albeit Chaotic Good), but even if they realize the situation, they have to do what they feel / know / believe is right, and if that means destroying the Eladrins plans, perhaps even slaying its Good &/or Neutral allies / minions, and maybe even killing the Eladrin - well, it is just another quest for the party, ever seeking to do Right - as they view and understand it to be. Slaying the Eladrin is not necessarily an evil act. It all depends on the situation. Any AL taken to extremes is potentially dangerous - although that may just be the Tao side of my personality speaking.