I just need you to go to this article here.
Scroll all the way down to the bottom and click on "View All (x) Replies".
Once you are on the All Replies page, find a comment with some number of replies to it and let me know if you can find any other way to see the replies to the comment in question without clicking on the time stamp and opening an entirely new page.
Right now we essentially have a species of pop up window with which to view expanded comments and it works pretty good. It doesn't seem like Kinja 1.2 has this at all. Even to see one stupid reply on this page seems to mean you have to open a completely new page.
If you find something I am overlooking PLEASE let me know.