I am still thinking this through. It's a very subtle topic. But having begun to think about it, the sheer number of arguments that I have found (which are in favor of preserving and employing the moral perspective) encourages me to believe that I was right - I'm just not sure where to place the emphasis! Of course there is such a thing as moral excess, addiction to moralizing, and so forth. But eschewing moral categories is psychologically and socially utopian (in a bad sense), the intersubjective character of the moral perspective has a lot going for it (it's cognitively holistic since it is about whole agents criticizing whole agents; you can't forgive someone unless you admit that they have wronged you; something about how you can't transcend the moral perspective, in the attractive emotional sense, unless you understand it by passing through it)... I wouldn't say it's just about computational utility.