As others pointed out, nobody needs the extra empty space, both around the comments and on the right hand-side, which is obviously room for ads, but is just annoying, making the discussion thread ridiculously long. The non-white background is horrible: reduces contrast and makes everything hard to read. Also, the moderation threshold adjustment is practically gone: You can have all comments (ain't got no time fo' dat!) or practically nothing on the screen. The moderation category filtering was maybe a good idea, but very poorly implemented: if you click on e.g. "insightful" and a thread starts with a reply, there is no way to get the parent comment (and no hope to make sense of what is being said). The same applies if you adjust the level by clicking on the geared wheel (which is an excellent burial place for this feature...). Moreover, there are no comments reduced to single-line entries, so you cannot really skim all information. I have often found interesting comments buried in the 2ish category that I only noticed because they appeared as single-line comments. Now I get +5 and 0 comments together, and the zero-comment has tons of whitespace around it, too!
I don't care what you do with the front page, the header and the footer. Hell, I would even put up with commercials between the treads (it would even help separating the threads), but don't mess with the comment section in such horrible ways. You could add the facebook, twitter, goodle+ and linked-in buttons without creating that abomination, IMHO.