I think sue being in the focus was great they should have an episode focused on each character or a few by seasons end. And theyve done that somewhat without distracting from the whole glee club aspect. The barmitzvah ep was ehhh.. but it was one episode set to basically wrap up the new kids and not deal with them any more so i dont blame them for doing that. And the 2 couples on the show got there wedding as well. Now focus is shifting to rachel.
Honestly, and we can kick and scream about mercedes, puck, arties, quinn, and sam all we want... but they havent really been interesting central characters for a while now so they wont get focus. I think it was good to do a sue focused episode, and add some closure to her character. Love her or hate her, the show is known for her. It just is what it is