If you mean by "non-moral-realist" "someone who doesn't think objective morality exists," I think that you've expressed my current reason for why I haven't read the meta-ethics sequence.

All the terms in this area have nearly as many definitions as they have users, but I think you'll find the meta-ethics posts to be non-morally-realist. Oft-repeated quote from those posts:

Not upon the stars or the mountains is [some aspect of morality] written."