Agreed. CEV is very fuzzy goal, any specific implementation in terms of an AI's models of human behavior (e.g. dividing human motivation into moral/hedonistic and factual beliefs with some learning model based on experience, then acting on average moral/hedonistic beliefs with accurate information) has plenty of room to fail on the details. But on the other hand, it's still worth it to talk about whether the fuzzy goal is a good place to look for a specific implementation, and I think it is.
CEV is our current proposal for what ought to be done once you have AGI flourishing around. Many people have had bad feelings about this. When in Singularity Institute, I decided to write a text do discuss CEV, from what it is for, to how likely it is to achieve it's goals, and how much fine-grained detail needs to be added before it is an actual theory.
Here you find a draft of the topics I'll be discussing in that text. The purpose of showing this is that you take a look at the topics, spot something that is missing, and write a comment saying: "Hey, you forgot this problem, which, summarised, is bla bla bla bla" and also "be sure to mention paper X when discussing topic 2.a.i,"
Please take a few minutes to help me add better discussions.
Do not worry about pointing previous Less Wrong posts about it, I have them all.