Kind of similar to an "if you were in charge" thread. If you could tweak a single episode of A:Tla/Lok, how would you do it?
My choices would be:
1. "Bato of the Water Tribe"
Instead of Aang purposefully stealing a message, have Katara and Sokka be divided over the issue with Sokka wanting to see their dad and Katara wanting to continue their journey as is. It makes more sense than making Aang look bad and the ending less half-assed.
2. "the library"
Have Sokka earn the information from Wan shi tong instead of steal it.