Where we disagree is that the second half of Book 2 was all that great. The season was good in the middle (around Beginnings), but was worse at the ends. I'm left largely unsatisfied by the way Book 2 ended. The first half may not have been terrible by TV standards, but, to me, the way it ended was. You clearly…

I vehemently disagree. That kind of speculation is what makes watching television engaging. We as an audience want to try and guess at what the show is going to do. This is what made Varrick turning around in that chair in Asami's office such a powerful moment. We speculated that Varrick might be a villain, but were…

But they can interact with spirits in the Spirit World. They should be able to bend in the Spirit World for the same reason if that's the explanation they're going with.

I accepted the rule that people couldn't bend in the Spirit World when we were just supposed to accept that as a fact. No real explanation was needed. The shaky reasoning behind why that is comes off as nothing but a work-around to explain how some people could bend in the Spirit World.

No, Aang choosing to do what he thought was right did that.

Not really, no. Korra trying to learn her real place in life was a theme explored throughout the season. The tree being anything more than a tree was something introduced at the last minute.

Aang's encounter with Pathik did not resolve his troubles with the Avatar state.

She could deal with it by trying to resolve it peacefully first before resorting to more violent means (violent means that would of course be necessary since we know Unalaq's intentions). The least she could do is escalate tensions between the two side of the conflict, something she admits to doing.

He didn't just destroy Wan's experiences. He destroyed Wan. He destroyed whatever part of Wan was imprinted on Raava, and that's much more than just memories. Korra is now no more connected to Aang or Wan than she is to Varrick or the Bush Hobo.

It was more than just memories that was imprinted on Raava. Roku was more than a memory when he spoke to Aang, and that's what Vaatu destroyed.

It would be character development, something Unalaq lacked throughout the season. I didn't like that Amon was a secret waterbender, either, but we at least saw a good bit of how Amon became the person he was. Every blank wasn't filled in, but he was given a human face. Unalaq's portrayal is just one of pure evil with…

He didn't meet Vaatu through the Spirit Portal, though.

Oh no, I understand the basic concept as it exists in the real world. But the concept of reincarnation in the real world is not the same as the concept of reincarnation in the show.

And when it was rebooted, she ceased to be Wan's reincarnation. Vaatu destroyed the part of her soul that connected her to Wan.

She's also a fully realized Avatar. If she couldn't deal with a Civil War, she's not a good Avatar.

It was more than memories that she lost. Wan and Aang existed in Raava as more than just memories, and that's what Vaatu destroyed.

Actually, I was thinking Jinora would have been a more suitable host for Raava once she was separated from Korra. Who would be a better host for the Great Spirit of Light than a character who in the finale was almost the embodiment of light herself?

I disagree that it isn't a deus ex machina, but I'll meet you halfway and stop calling it that anyway. Instead, I'll just call is bullshit and poor world building. We should not be introduced to the plot device that resolves the central conflict of the show at the very moment we need a plot device that resolves the…

Fair enough, I guess.

Again, that's exactly why it's bullshit. The plot device that resolves the central conflict of the season isn't introduced, not even teased at, until something is needed to resolve the central conflict of the season. It screams of lazy writing.