Some of these (e.g. Roko's) concerns might be clarified in terms of the distinctions between sense, reference, and reference-fixing descriptions. I take it Eliezer wants to use 'right' as a rigid designator to denote some particular set of terminal values, but others have pointed out that this reference fact is fixed by means of a seemingly 'relative' procedure (namely, whatever terminal values he himself happens to hold, on some appropriate [if somewhat mysterious] idealization). There is also some concern that this doesn't match the plain meaning or sense of the term 'right', as everyone else understands it.