Well due to the comet their attacks were much larger. She was agile in anycase as she was skating around the area the break dancing flames knocked her down no amount of agility would do anything to keep her up but yeah her insanity did drag her down some levels.
That’s something I find funny looking at it. Nick didn’t give them the pass to have Jet die on screen but they showed Azula literally snap head rolling on the ground screaming and crying, that to me is a more disturbing scene.
I don’t think they have mentioned it at all. She is the only one who has spat out blue flames I think it’s for artistic reasons mainly. Ozai’s fire attacks were more intense and deadly than hers yet they were orange. Even when Zuko punched her flame back in southern raiders they cancelled one another out.
Having them coloured is a simple way of illustrating the differences between her and Zuko.