I am really happy with the ending. The voice acting was amazing, especially for Earth Lord Zelda. The fighting was really good this episode too. It was great to finally see Korra kick some ass. To me it finally felt like Makko and Bolin were brothers instead of just being told they were brothers. Varrick and Zhu Li getting together made my shipper heart grow three sizes. I've wanted them to be together since they were first introduced. And my god that Korrasami ending was beautiful. It had been building up since season 3, and I know a lot of people are saying its only platonic because there was no kiss or 'I love you", but honestly do you know anyone who walks holding hands while gazing into each others eyes before going on a vacation together who calls themselves just friends? Plus it would be weird for them to start making out/say I love you on the first date. I'm not really a fan of Aang, and Katara's kiss at the end of ATLA either(but I'm just really not a fan of Aang/Katara at all).
So overall I'm sad it's over because it was such a great show, and we need more shows like that aimed at kids, but I am very happy with how it ended.