I have a question here: Did Amon actually bite off his upper lip and shave of his eyebrows for this particular scene, just to have both magically reappear one scene later? Ok he's a waterbender and probably a healer but this was sloppy.
Also Tenzin's family was apparently just captured for the sake of being freed anyway, making everything Lin did one episode earlier pointless and her sacrifice kinda void. And she pops out of nowhere in the end too. Probably was with Pema but they could have atleast showed it.
I agree with everything Nex said about Korra learning airbending, without actually understanding its concept. I could buy her learning airbending because Amon disconnected her physical side of bending, opening the spiritual paths in her body. But for that they would have to atleast mention it and not have me fill out the blanks with borderline fanfiction here. I am trying to cooperate story writers! Give me something to work with here!
And the sudden resolve of everything at the end was too rushed and didn't come with the satisfaction of her earning it. Suicide intents or not. Personally I think she was just depressed and didn't want to jump. And that shouldn't be enough to trigger the avatar state.
And finally
My personal stance on ALL THE ROMANCE.
I seriously thought in the final scene that Korra and Mako were standing in a chapel and were getting married. Thank god it was just Lin kneeling to get her bending back. I'm happy for them and I will let them finish, but shit, the build up to this couple was damn weak. Good looking designs still don't make good character chemistry. And there was almost none to speak of between these two.
I am glad there are other writers other than the two original ones involved next season so things will maybe feel a bit more natural with things like these?