Avatar: The Legend of Korra is by no means as good as the phenomenal The Last Airbender, but you can tell that the team behind it had a lot on their minds regarding the Avatar universe. And that may be its biggest flaw.
What I mean is that all the elements that made its predecessor so great is still in here, but at the same time it's trying to be its own thing which ends up making it feel all over the place with world-building, character arcs and romance plots either scattered across all four seasons or hastily concluded without feeling fully developed.
The first season is in my opinion the most successful at blending it all together with Korra coming to Republic City to discover a colorful crowd amongst the many inhabitants and what they do in their leisure time and the way the higher-ups run the city. And a dark side of a seemingly peaceful place for all which include the chilling Amon on top of a rebellion.
So, while there is a promising premise for season two about the spiritual side of being the Avatar which leads to an epic conclusion and an interesting result, it is here it all starts to jumble together with various subplots which makes it feel disjointed and rushed.
In the character department we have Korra as the main character, a young woman with a temper who sadly often comes off as arrogant and bratty. She learn throughout the series, but is also a victim of the messy writing. The characters are a mixed bag overall.
Animation is still top-notch, and when the series keeps its focus, we get an expanding look into the world of the Avatar and the people attached to her/him.
