Shit, I've got a .txt file open right now with a Frankenstein's monster of a long comment intended to attack the neo-reactionary ideology with regards to issues of structural power and social dominance... epistemology and the biases/rationalizations caused by privilege (building on a "cheap shot" about your pals all being straight white tech-minded guys, having at least modest economic security, living in modern liberal democracies and communicating freely in a de facto libertarian-socialist network)... the way historical narratives are formed and how they relate to social psychology/self-image/intergroup relations (re: all conservative talk of a Relatively-Golden-Age)...
I would be highly interested in reading such a post, either here at LW or somewhere else. You shouldn't worry too much about it becoming too long or its style being unsatisfactory; these are complicated issues, and getting some editorial commentary from other users would also help.
I do agree that More Right itself won't help much wrt. non-right-wing political commentary. Really, we need to start embracing friendly, benign factionalization and create a network, 'planet' or blogroll of political/rationalist venues inspired by other political ideologies. As you say, even just the inferential distances among differing worldviews and ideologies make a centralized treatment quite hopeless. And that's before taking all kinds of legitimate controversies into account, which mean that the 'network' approach will probably be trusted to a greater extent by potential users.
Various people (including Konkvistador who has been talking about it the most) have launched their blog More Right
"A group blog, More Right is a place to discuss the many things that are touched by politics that we prefer wouldn’t be, as well as right wing ideas in general. It grew out of the correspondences among like minded people in late 2012, who first began their journey studying the findings of modern cognitive science on the failings of human reasoning and ended it reading serious 19th century gentlemen denouncing democracy. Surveying modernity, we found cracks in its façade. Findings and seemingly correct ideas, carefully bolted down and hidden, met with disapproving stares and inarticulate denunciation when unearthed. This only whetted our appetites. Proceeding from the surface to the foundations, we found them lacking. This is reflected in the spirit of the site."