It seems like a winner-take-all problem in the comments to me. As LW sorts submissions by date and not by reddit's algorithm it is no problem to see valuable posts by their upvotes. In the comments however posts are sorted by votes and here winner-takes-all comes into play as most people only read the first couple of posts and late-comers drown out.
Above the top-level comment box, there's an option to sort comments by date. Perhaps that should be the default.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.