I posted some thoughts about this on Facebook, and there's some discussion here:

https://www.facebook.com/raymond.arnold.5/posts/10207633701854619?comment_id=10207634223027648¬if_t=like

My most important thought is:

We should not be thinking in terms of "how can the current LW community bootstrap itself into creating a platform that'll enable good content." We should be thinking primarily in terms of "can we build something that Eliezer, Scott, etc would be actively excited to use." (Where "Eliezer/Scott" is a stand-in for "anyone who's currently creating good content in a non-centralized place)

I like some of the ideas in this post, but I think they're emphasized a little weirdly. I think the biggest obstacle we're facing is that the Popular Bloggers like to be able to talk about whatever they want, and they want control over their comments.

A lot of this post (and other attempts) seems to be thinking in terms of "how to restore LW to a sort of Platonic version of itself, where an upvote/downvote system and policy attracts and outputs quality content", and I think that approach won't actually solve the core problem.