The comment system itself only supports a good 100-200 comments. It's too daunting of a task to read every one, and it's impossible to search for useful information. Most of the problem here is a programming problem which cannot be solved by anyone who doesn't have direct access to their subconscious mind, which is the majority of LW.

I agree that the comment system could be much improved, but I don't see where direct access to one's subconscious fits into that.