I think a part of the problem with other people filling the "vacuum" left by Eliezer is that when he was writing the sequences it was a large amount of informal material. Since then we've established a lot of very formal norms for main-level posts; the "blog" is now about discussions with a lot of shared background rather than about trying to use a bunch of words to get some ideas out.
That is, most of the point of the sequences is laying out ground rules. There's no vacuum left over for anyone to fill, and LW isn't really a "blog" any more, so much as a community or discussion board.
And for me, personally, at least, a lot of the attraction of LW and the sequences is not that Eliezer did a bunch of original creative work, but that he verbalized and worked out a bit more detail on a variety of ideas that were already familiar, and then created a community where people have to accept that and are therefore trustworthy. What this "feels like on the inside" is that the community is here because they share MY ideas about epistemology or whatever, rather than because they share HIS ideas, even if he was the one to write them down.
Of course YMMV and none of this is a controlled experiment; I could be making up bad post hoc explanations.
Just to be clear, what you say does not contradict the argument you are responding to. You gave a good explanation for why EY has a big influence on the community. It still isn't clear that this is a good thing.
A few notes about the site mechanics
A few notes about the community
If English is not your first language, don't let that make you afraid to post or comment. You can get English help on Discussion- or Main-level posts by sending a PM to one of the following users (use the "send message" link on the upper right of their user page). Either put the text of the post in the PM, or just say that you'd like English help and you'll get a response with an email address.
* Normal_Anomaly
* Randaly
* shokwave
* Barry Cotter
A note for theists: you will find the Less Wrong community to be predominantly atheist, though not completely so, and most of us are genuinely respectful of religious people who keep the usual community norms. It's worth saying that we might think religion is off-topic in some places where you think it's on-topic, so be thoughtful about where and how you start explicitly talking about it; some of us are happy to talk about religion, some of us aren't interested. Bear in mind that many of us really, truly have given full consideration to theistic claims and found them to be false, so starting with the most common arguments is pretty likely just to annoy people. Anyhow, it's absolutely OK to mention that you're religious in your welcome post and to invite a discussion there.
A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Note from orthonormal: MBlume and other contributors wrote the original version of this welcome post, and I've edited it a fair bit. If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post. Finally, once this gets past 500 comments, anyone is welcome to copy and edit this intro to start the next welcome thread.