Fucking great Tenzin, you're the only living airbending master in a world where airbending suddenly becomes huge, and you decide to fight to your death, possibly endanger a lot of people and your family, just to show how badass you are?
Aang would slap the shit out of him for this.
Yes, the fight was nice, even if I'm angry Tenzin was only marginally better than Zaheer - I mean, I know you need to show this guy means business, but why not show Tenzin mock him? Tell him sometimes his stance is laughable and actually show how overwhelming difference is between someone who only read about airbending and someone who was taught by one of the best airbenders in history? I know Tenzin is no genius, but to show how powerful he is would be great - I'm still bummed only Aang ever showed us a freakin' tornado during his fight with Bumi - creating something like this, showing Zaheer for the first time really scared, Tenzin on top of it all pissed off this little amateur dared to threathen his family - this would be great. THEN the others could attack him and help Zaheer win the fight, maybe show Tenzin break an arm, lose his robe and decide to run, just to save his knowledge, because he remembered how precious he is for the next generation of airbenders - THAT would be great.
Oh yeah, on the subject of things I hate - Bumi. I hate him now. He was supposed to be this badass guy, who jokes, but still knows his shit, because he spend all his life as a normal guy, with no bending skills. And what do we get? A guy who has no weapon, can't fight in any way AND who decides to throw away everything he ever knew just to fight using airbending, he got a few weeks ago!
I mean, I bet if Sokka could suddenly bend any element, he'd still keep his weapon - because he knows he had it for so long, and bending isn't always an answer - he defeated a bending anomaly that was Combustion Man thanks to his boomerang, where no one else could've done anything! Why not make Bumi the guy who is a weapon master, but who gets bending and decides to use it as a secondary thing? To show him fighting with a sword AND trying to create his own airbending, by using the sword during the fights? SO MUCH POTENTIAL! What we got was boring - the villain are getting a little bit boring, because we always see them as awesome and perfect, always fighting the same and I just don't know what they could do now to make the finale worth it all…