The ending did feel rushed, but I was very happy with the finale. Amon being Tarlokk's brother and a Waterbender/Bloodbender, I did not see that coming. Korra finally airbending was one of the best things ever. I've never fist pumped and screamed so much at a TV show before. But my all time favourite moment, and this might be the nostalgia talking BUT I DON'T CARE, was Aang's little appearance at the end. Although I was a little disappointed that the de-bending is reversible, because now it feels like Lin's sacrifice was pointless.
Now we're left waiting for Season 2, and I am very curious as to how they're going to do it. As far as I'm concerned, everything from this season was resolved.