I'm not gonna argue it was great, but the ending was brilliant, it did a lot to advance Aang as a kind of trickster god character who is willing to go to certain moral extremes to avoid conflict and war, and when you look at it like that, it kinda foreshadowed the ending of the whole series where Aang hates war so much that he invents a new kind of bending to fix it (a kind of bending that as LoK points out is not necessarily very nice)