I think think I disagree, but I'm not sure I understand. Care to explain further?
(Note: This comment contains positions which came from my mind without an origin tag attached. I don't remember reading anything by Eliezer which directly disagrees with this, but I don't represent this as anyone's position but my own.)
"Standard" utilitarianism works by defining a separate per-agent utility functions to represent each person's preferences, and averaging (or summing) them to produce a composite utility function which every utilitarianism is supposed to optimize. The exact details of what the per-agent utility functions look like, ...
In You Provably Can't Trust Yourself, Eliezer tried to figured out why his audience didn't understand his meta-ethics sequence even after they had followed him through philosophy of language and quantum physics. Meta-ethics is my specialty, and I can't figure out what Eliezer's meta-ethical position is. And at least at this point, professionals like Robin Hanson and Toby Ord couldn't figure it out, either.
Part of the problem is that because Eliezer has gotten little value from professional philosophy, he writes about morality in a highly idiosyncratic way, using terms that would require reading hundreds of posts to understand. I might understand Eliezer's meta-ethics better if he would just cough up his positions on standard meta-ethical debates like cognitivism, motivation, the sources of normativity, moral epistemology, and so on. Nick Beckstead recently told me he thinks Eliezer's meta-ethical views are similar to those of Michael Smith, but I'm not seeing it.
If you think you can help me (and others) understand Eliezer's meta-ethical theory, please leave a comment!
Update: This comment by Richard Chappell made sense of Eliezer's meta-ethics for me.