I will add that I was really impressed with the battle overall and how it gave a better sense of scale than The Avengers did in its final battle despite having an infinitely larger budget. Big ol robot fucking up a big ol city compared to big ol alien army mildly inconveniencing a city block.
Didn't we already see several of them in A:TLA? Pretty sure that's what Zuko rides around on in "Zuko Alone".
Anyway, I think they really outdid themselves on this finale, I never though they would be able to recreate what I felt after finishing A:TLA but they honestly came really close.