True, but OP, and this anon >>100225112
are right. When you actually read about the behind the scenes for Last Airbender, they had a good share of people to bounce off their ideas, and they needed more of that for LOK. Like when someone told them to make Toph female, instead of male.
And it was apparent that they needed some "filler episodes" as buffers, too, because some shit felt super rushed, and maybe it wasn't even rushed, or anything like that.