Something that made the finale better: Mai with Team Avatar.
What Mai is doing here is more than just accompanying Zuko, we all know she could have simply said No. But now, her ego does not control what she feels for Zuko because she knows that it’s worth it.
Mai is not sulking around, denying anyone. She is next to Katara, calmly playing with Suki. And it feels nice, and it gives it a nice warm touch, to see that it is never a bad time to start over because once you deeply fall in love with someone, you do extraordinary things.