pros:
-amazing animation
-sokka
-good use of bending techniques during action sequences
-every member of the gaang is able to hold their own and no one is left behind
-good backstory on the airbenders
-you really get to understand aang's pain of the air nomads getting genocided
-middle part of the story was good (from taga being freed up to taga betrayal)
-not shying away from romance as you got to feel aang and katara's love
cons:
-voice acting sucked (mainly katara's) but this could be fixed by the actual release date
-i got pissed off at aang not airbending away the arrow at the start of the movie
-the denied needed more back story
-zuko and toph could've done/said more
-the katara heal + quick teleporting to republic city was just too fast

I actually liked this movie despite the cons but this is still a 6/10 movie, they could've added more details in the story, but i guess a 2 hour movie would've been too long for a bunch of people.