aside from a lot of arguing about definitions over whether Eliezer counts as a relativist
I think the whole point was to taboo "realist" and "relativist." So if people come out of the sequence arguing about those definitions, they don't seem to have gotten anything out of the sequence. So, yes, aside from everything, there's no other problem. But that doesn't help you narrow down the problem. I suspect this is either strong agreement or strong disagreement with gjm, but I don't know which.
There seems to be a widespread impression that the metaethics sequence was not very successful as an explanation of Eliezer Yudkowsky's views. It even says so on the wiki. And frankly, I'm puzzled by this... hence the "apparently" in this post's title. When I read the metaethics sequence, it seemed to make perfect sense to me. I can think of a couple things that may have made me different from the average OB/LW reader in this regard: