Compared to the previous "Avatar The Legend of Aang", the world is greatly changed. New technologies exists in its more modern setting. And that makes the story more exciting. Non-benders fight benders with technology (just an idea! benders can use technology too, wonder why they're not using it for their advantage) .
Thus the battle begin for said equality against benders. (Not having the ability to bend in this avatar world sucks, I think I understand the crave for equality). That makes the story more interesting. The enemy can take bending away permanently. (Picture in the right side is the leader of non - benders).
I don't want to spoil you anymore. Here are just my thoughts. But I would recommend you to watch this. (Although it would make much more sense if you watched the first avatar series.)
