It did not stay true to the original cartoon show, Ang left the sky temple in anger and sadness because he was told he could not be around his guardian any longer, Ang did not have the bison whistle until later on, Sokka and Katara had a better dynamic.
Scenes were cut out and they were changed entirely like the capture scene where Ang was taken, he was not imprisoned and Sokka and Katara do not know how to fly Apa without the words yip yip.
I am just disappointed in the show and it is to be expected.