My understanding was that the idea was for LesserWrong to run as a beta with a few users switching over and the main site still running until enough bugs had been fixed and enough missing features had been added so that we could have a vote and then decide whether to replace the old LessWrong.
What has actually happened is that all of the attention and worthwhile content has shifted over too LesserWrong, meaning that nothing is happening on LessWrong. This creates something of an issues:
If we encourage all the people remaining on LessWrong to shift to LesserWrong right now, then they will find a site that still has many bugs and which is missing many core features.
On the other hand, the status quo has costs as well. Anyone visiting LessWrong will find a forum that is not very lively and which doesn't contain particularly good content (because those in the know are posting to LesserWrong). In other words, all of the issues with lack of content and engagement on old LessWrong have now greatly increased.
I don't have any proposals. I simply wrote this to bring this issue to people's attention.
I have confidence in the new site. I think that enough people have switched over to LesserWrong and started posting quality content that we now have critical mass. So this isn't a disaster, but I thought it was important for someone to explicitly say what I'm sure a lot of other people are thinking.