I know people are saying this episode (kind of) confirms Tarrlok isn't Amon, but that can't be made for certain until we fully understand what Amon's grand scheme is. For all we know, Tarrlok could be pulling a Palpatine; playing both sides to achieve one goal. I can't see the creators not being fans of Star Wars and influenced by Palpatine/Darth Sidious in some way. He was my favorite character in the prequels.
Also, did you guys notice Tarrlok's reflection in the waterfall? His hair and face was blurred to look like Amon. Not to mention when he reached over to grab Korra, it was the same hand reaching and camera angle that they use for Amon when he's about to take away someone's bending. This was purposely done.
Yeah, advanced techniques are so common that they are used for more trivial things like working at a power plants and construction...They aren't really all that special anymore...that does parallel real life, where the things we have today were luxuries to a few.
About the council, have any ONE of them even talked at all besides Tenzin and Tarrlok? They seem kind of just there to agree with Tarrlok and oppose Tenzin.
Maybe Tarrlok is bloodbending them to make them agree.
I wonder how Tarrlok will be able to explain all of the earthbending damage in the building where the council works.
Here's something I found tumblr that's a theory about the flashbacks we've been seeing. It was quite fun to read and we'll see next week how true any of this actually is. I guess I could say spoilers but since its all speculation its really not.
http://birdbrainblue.tumblr.com/post/24281699688/an-analysis-of-the-flashbacks
Well my friend told me Amon in old Egyptian means personification of air or breath. So the crazy theory that Amon is some secret air bender or even Aang has credence.