Ok, I can see why you read the Pebblesorters parable and concluded that on Eliezer's view, morality comes from human feelings and intuitions alone. The Pebblesorters are not very reflective or deliberative (although there's that one episode where a Pebblesorter makes a persuasive moral argument by demonstrating that a number is composite.) But I think you'll find that it's also compatible with the position that morality comes from human feelings and intuitions, as well as intuitions about how to reconcile conflicting intuitions and intuitions about the role of deliberation in morality. And, since The Moral Void and other posts explicitly say that such metaintuitions are an essential part of the foundation of morality, I think it's safe to say this is what Eliezer meant.
I'll set aside your scenario A for now because that seems like the start of a different conversation.
Elizier doesn't have sufficient justification for including such metaintuitions anyway. Scenario A illustrates this well- assuming reflecting on the issue doesn't change the balance of what a person wants to do anyway, it doesn't make sense and Elizier's consequentialism is the equivalent of the stone tablet.
My apologies if this doesn't deserve a Discussion post, but if this hasn't been addresed anywhere than it's clearly an important issue.
There have been many defences of consequentialism against deontology, including quite a few on this site. What I haven't seen, however, is any demonstration of how deontology is incompatible with the ideas in Elizier's Metaethics sequence- as far as I can tell, a deontologist could agree with just about everything in the Sequences.
Said deontologist would argue that, to the extent a human universial morality can exist through generalised moral instincts, said instincts tend to be deontological (as supported through scientific studies- a study of the trolley dilemna v.s the 'fat man' variant showed that people would divert the trolley but not push the fat man). This would be their argument against the consequentialist, who they could accuse of wanting a consequentialist system and ignoring the moral instincts at the basis of their own speculations.
I'm not completely sure about this, but figure it an important enough misunderstanding if I indeed misunderstood to deserve clearing up.