This anon >>114119322
has right, a brash overconfident young woman/teen who neglects her spiritual, erudite side in favour of fitness and physicality. She tends to overcompensate, hiding her insecurity by punching first and asking questions later. This approach has her hit a wall against most season's antagonists, and she can't handle the fact that they can beat her easily. Her strength is something she prides herself on, yet still she gets stomped.
Book 1 could go much the same, having her get bent over by Amon. Ignore the subplot that she can't airbend at all, just make it harder for her to get into the moves and mindset. More attention to the political resolution where the Council is dissolved and a president gains power, essentially a victory for the Equalists.
Book 2 would have had a less world-ending threat and simply be about the cultural conflict between her own people, material enough there. Maybe it could have ended with a formal separation of the North and South poles. Unalaq would simply be trying to get her on his side in the war, and he'd survive the aftermath after beating Korra but losing the war. Korra would need to develop skills as a diplomat and learn to let go and that not every war can be won.
Book 3 is good, it ends with Korra almost dying and lots of trauma. Maybe a few episodes to show how her near-death experiences over past seasons are making her more zen and mature.
Book 4 needs to portray Kuvira as a more sensible option. Making the king and Suyin the default good guys was too easy, and the democracy thing was dumb. Still, a conflict between a more level-headed Korra and a driven character like Kuvira would have been a great conclusion to the series without a giant mech.