As a writer myself, I know how hard it is to make a story with interesting characters and world.
Sure. But I think any writer worth their weight in salt, knows how to step back and also consider what has been written before (the continuity). There is no excuse for lazy writing. The only thing I will say, writers are under extreme pressure and time to get things written. But I just don't understand how you can have a team of writers, and some very basic things aren't put in check. Things that could be fixed, just by having a round table discussion.
I mean, just us in this thread alone, could spend 40 min reading a script, and pointing out the issues with certain things (like overall plot stuff not working with past plot). They really aren't capable of doing that?
And what gets me, there is plenty of shows with the same format and same deadlines, that are able to do this. So at a certain point it just feels like, they are running with things and not really doing the proper analysis of their own writing. You look at a show like Dexter, and it's mind blowing how lazy they got. Like very basic things (such as character behaviors and basic characteristics) and past themes no longer making sense. I have to imagine it was a situation where a bunch of writers that had big egos, were basically circljerking the other, and telling them how brilliant they are and how deep they are.
So when you get a situation where everyone is just praising the other, then shit like that happens. I doubt that was the case here. I assume the problems with ATLA is just, a time thing. A little bit of time limitations/pressure, and the writers just not being very good. I've always argued that Bryke are great idea men, but not so much good storytellers (like telling the middle part of a story. They write a good beginning and end -- well, their ends for Korra have been mostly shit. But you get my point).
Looking back at ATLA, it's kind of telling that Bryke would write the opening episodes, the mid season finale episodes, two part episodes, or the finale itself. So pretty much the episodes that had major main story plot. But all the other episodes (the bulk of ATLA) was other writers. So it's as if, Bryke can't actually write a fluid story, but can only come up with really great ideas. Which is fine. Their ideas are damn good. Whatever criticisms you have of this series, the world they've created is really something amazing.
I sometimes wonder ATLA would have been like, if it was 13 episodes and Bryke did the majority of the writing. I really think the 22 episode format, and Bryke being able to step back and take leadership role while a talented team of writers fleshed out the characters and the side plot, also gave them the time needed, to keep coming up with the bigger ideas (ie. the finale's, the two part episodes etc.)