Some people have expressed their disappointment with the premeire episode. I would ask these people to consider some things.
First, all summer long you have been building up your expectations. "Oh boy! I can't wait for the new season! Etc." This puts undue pressure on the first episode to satisfy these overly high expectations. Unless the premeire is super phenominal it will disappoint no matter if it as good as any other episode.
Second, you compare this episode to your favorite and/or similar episodes. So, now you won't appreciate the episode on it's own merits.
Third, and last, this might have been an NBC programming move.