I'm not sure that there is community consensus that "human beings currently living" is the right reference class. Eliezer suggests that he thinks the right reference class is all of humanity ever in this post.
If one assumes some kind of moral progress constraint and unpredictable future values, CEV(living humans) seems like our future descendents would hate it. Certainly, modern Westerners probably would hate CEV(Europeans-alive-in-1300). But I'm a moral anti-realist, so I don't believe there are constraints that cause moral progress - and don't expect CEV(all-humans-ever) to output a morality.
.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.