I know you are trying to make it better, and there are lots of improvements too. However, now we must go to the end of a thread to post a new comment. Does that make sense? We view the new comments at the beginning of the thread. And we could (before you changed it) post a comment without going back through the whole thread. Couldn't you place the option on top with the "Bookmark this" and the "Share this" options as well.
Sorry, I don't mean to be annoying, but I really like the feature up top.