Indeed. Eliezer's post itself, however, seemed mostly to caution against it, and perhaps what he took away from the subsequent discussion, after weighing the various contributions, was that it had too little to recommend it. At any rate, that I'm aware, the question wasn't raised again?

Of course one issue is that it was never clarified what "it" might be, i.e. what would result from treating LW more explicitly as a "rationality dojo" (that would be different from what it is at present).