Don't get me wrong, they wrapped up the finale really well. That last scene blew my mind and made me think Mike and Bryan were giving Nickelodeon a big in your face! It would have been funny to end the scene on Korra saying, "I'm the Avatar, you gotta deal with it!"
P.S. I really thought we were going to get a little more Gen. Iroh in the battle too, but oh well.