Only issue I had with it was that they didn't make any mention of the unusual Avatar statue we last saw Ikki staring at as it lit up. The way they set up her disappearance for a whole episode made it feel like she was taken by the spirit of that Avatar or something, which would have tied the Tenzin arc with the Spirit conflict, and demonstrating that this Spiritual battle is much more global than just the two water tribes. Finding Ikki safe in a cave somewhere felt a bit anti-climactic. It was still good, and I like that the conflicts are starting to brew, but right now the Tenzin arc might as well be a different show. It'll connect I'm sure, but it's taking a while.