@UranusAndNeptuneAreJustCousins
ATLA had more episodes in total and per season which gave it more room for character driven filler and even though it got cancelled early*, it still didn't have to live in fear of not getting renewed for multiple seasons like Korra.
TLoK has a lot of flaws, and Korra and Asami don't really have enough screen time, but the shows does what it needs to get its points across, even if it has to stoop to subtext to get there.
And as much as TLoK failed, it did succeed in breaking the barrier for wlw couples in western children's animation. We got a lot of kisses out of most if not all subsequent shows.
*the biggest result of this is azula missing her redemption and getting dumped in the trash with all her flaws blamed on mental illness. Easily the weakest part of the show, it tarnishes Zuko's arc as well by softening their abusive upbringing.