Alignment and morality is difficult to do, but D&D needs to address it.

At it's core, D&D is heroic high fantasy. It's a game designed to represent heroes and villians, mighty struggles of good vs. evil, where the forces of light conquer the forces of darkness. That's the kind of setting and game D&D was designed for, and the world needs a good game to fill that niche.

That said, some people may want a more morally ambiguous campaign, but still high fantasy(low fantasy as a rule doesn't fare well with D&D), and that's fine. However, if people are looking to think more about morality, they should be willing to use optional modules, or you know, think about morality. In a morally grey world, having a book tell what what's right and wrong doesn't make much sense.