One of the downsides of The Legend of Korra having shorter seasons (thanks to Nickelodeon ineptitude) was there were no "filler" episodes to show more character moments with the new cast.

They never got a "Tales of Republic City" or a "Ember Island Players" style episode... they got a damned clip show becuase Nick cut the final season's budget and said either make it or have one less episode (and a cut in staff pay).