Where moral judgment is concerned, it's logic all the way down. [..] And since grinding up the universe won't and shouldn't yield any miniature '>' tokens, it must be a logical ordering

The claim seems to be that moral judgement--first-order, not metaethical--is purely logical, but the justification ("grinding up the universe") only seems to go as far as showing it to be necessarily partly logical. And first-order ethics clearly has empirical elements. If human biology was such as to lay eggs and leave them to fend for themselves, there would be no immorailty in "child neglect".