What I like about ALTA and LOK are the Fighting styles, in the former, we see more Traditional Chinese Martial Arts, the Constant Blocking and dodging and the Punches are Vertical Facing and in the Latter, we see Horizontal Facing Punches and swift Footwork to engage and Disengage like more "Modern" fighting styles.
I see alot of People saying Legend of Korra's fighting is terrible or Boring.What you all need to understand is that in LOK, it depicts what Martial Arts is like in our World Today, the Destruction and Preservation of Old and Historic Arts, the Evolution of Combat and the New Generation favouring more easier to Understand and more easily utilise styles.
It also has to do with the environment.In ALTA, the Spaces are Wider, be it Urban or Rural, this allows a far bigger range of Movements and Motions, in LOK, places are smaller and more compact, it's better to square up and keep your fists close to your Head because if you leave it open that's a guarantee Hit.
Different Situations, Different Environments, Different Wars cause a Combat Art to change and Evolve.
Traditional Chinese Martial Arts turned into Sanshou and Jeet Kune Do.
Muay Boran turned into Muay Thai.
Traditional Vietnamese martial arts turned into Vovinam
Japanese Martial Arts gave birth the whole concept of Gendai budō.
All because change happens, nothing can stay the same for so long