Nice ideas! I think you highlighted well the fundamental problem of lack of social rewards for writing content for LW, and having strong criticism for doing so.

Regarding changing things, I think it makes sense to work with people like Scott who have a lot of credibility, and figure out what would work for them.

However, it also seems that LW itself has a certain brand, and attracts a sizable community. I would like to see a version of the voting system you described implemented here, with people who have more karma having votes that weigh more. I'd also like to see some cross-posting of content from Scott and others on LW itself.

So not doing away with LW as it exists, but expanding it in collaboration with others who would be interested in revitalizing a different form of LW. One where authors get appropriate credit for posting, with credible people - those who have lots of karma - being able to upvote them more.