Less Wrong is extremely intimidating to newcomers and as pointed out by Academian something that would help is a document in FAQ form intended for newcomers. Later we can decide how to best deliver that document to new Less Wrongers, but for now we can edit the existing (narrow) FAQ to make the site less scary and the standards more evident.
Go ahead and make bold edits to the FAQ wiki page or use this post to discuss possible FAQs and answers in agonizing detail.
"Subjective" has many meanings. The article uses "subjective" to mean dependent on the mind in any way. Not just a mind's assessment.
Given this definition of subjective, the article would classify your last paragraph as an example of subjective relativism.
I see. Just to clarify fully: in my last paragraph, morality depends on the mind because a mind is required for preferences and agency? Are there any exceptions to this?