It had a similar plot structure to the second film which was weird, even the character arcs are similar to those from the second film. a bit of a nothing film in that regard
the special effects are still good
the new evil goth witch na'avi lady was hot, that was good
having the villain pair up with the new evil goth witch na'avi lady was good, although she becomes an accessory to him in the second half of the film which sucks
all of the problematic elements from before are still here so if that was an issue for you in the previous films that will still be an issue now.
Spider being this white guy who now is a na'avi who is accepted by the na'avi felt kinda weird in a way i can't crisply articulate right now
the main character gets really unlikable in this film. his refusal to trust his son nearly leads the child to suicide (!), and then he nearly kills Spider who is like a son to him? fuck this guy