Hey Michael,
I’d be a bit surprised if you could find positive, substantive conclusions that metaethicists tend to converge on. My impression is that there’s a great deal of disgagreement in the field.
However, I suspect you could find convergence on negative issues—that is, there are certain views, or at least certain combinations of views, that they might all agree should be rejected. Since I don’t know metaethics well enough, I won’t try to offer an example, but I do know that this happens in other areas of philosophy. To take an example that’s already been mentioned in this thread, I think the fact that most people who give serious thought to Popperian Falsificationism converge on the conclusion that it’s wrong (even while many people who haven’t thought seriously about it find it plausible) is some evidence that they’re getting things right.
I wouldn’t be surprised if there are substantive theories in metaethics that might seem plausible to people who haven’t given them serious thought, but which philosophers have come to reject. If that’s the case, then absent foundational worries about their methods, I think we should tend to think that their convergence is evidence that they’re right to reject those theories. If we’re interested in the questions that Eliezer posted, we should look at what philosophers have had to say about them—even if we’re not likely to get the right answer this way, we may be able to eliminate some wrong answers.
Simon,
While I’m not sure what you mean by saying that most philosophers working in ethics think that morality is something “out there” I suspect that on a suitable clarification of “out there” it will turn out that lots of constructivists, quasi-realists, and anti-realists of various varieties will not think that morality is out there.