I think this would work better with each question asked separately, since they are not mutually exclusive. Idea A: Accept that LessWrong has fulfilled its purpose and should be left to fade away, or allowed to serve as a meetup coordinator and repository of the highest quality articles.

Idea B: Allow and encourage submission of rationalism, artificial intelligence, transhumanism etc related articles from elsewhere, possibly as a separate category. Idea C: Allow and encourage posts on "political" topics in Discussion. Idea D: Get rid of Open Threads and create a new norm that a discussion post as short as a couple sentences is acceptable.