No go on the threaded comments.
First of all, it only indents once. That's a good space-saver, but kind of defeats the purpose of using the threaded format.
Second, as Allan points out, threading makes it more difficult to scan through a comment thread to read only the newest comments.
And finally, the new comment style added justified text and a narrow line height, which look bad. Hopefully reverting back to the original style of commenting will change that, too.
On we go.