I guess what im trying to say is that you cant compare Kora with TLA because TLA had everything, TLA left nothing for Kora to explain. Although Kora is a good series, for what it is, at least in my opinion. If you wanted Kora to be like TLA then you want an exact same story line (learning all of the forms of bending, going around the same main cities, fighting henchmen, learning the same information we already know about the Avatar, spirit world, energy bending) with a different Avatar and villain.
I was actually looking for more of the spirit world to be shown. We only saw/heard about snippets of it in TLA.