Seeing Varrick return was great, although I hope Zhu Li is back as well, since she is his assistant, after all. Other than that, nice new episodes, I especially liked the Metal Clan. Seeing the characters explore the world is great, especially when they landed at Zaofu, which just looks amazing. The artistic metalbending practice scene was wonderful, and even just the little things like seeing Su Jins' siblings practice a sport they had made up themselves, it was very cool. What was also cool about it was that it was a private safe haven between the mountains, away from all these other jam-packed cities like Republic City and Ba Sing Se, which are filled to the brim with corruption.
Su Jin's a cool character, and while Lin was acting like a jerk to her, I'm really interested in them explaining her feelings about it all more, as things have always been a bit more complicated for her.. well, in season 1 that is. Going into the whole family debate, Su Jin seems to have a very stable family, and as far as the complaints go for Opal being a bland character, I think she's fine. Generically sweet and not exposed to much cruelty? Sure. But she seems to serve a purpose in further bringing our both Korra and Lin's character, as well as the dynamic between one another. She also allows for Korra to try gaining some more responsibility with her teaching sessions and whatnot. Although Bolin trying to be the flirt felt pretty stupid and unnecessary (Reminds me of Sokka, which reminds me of how I like Sokka way more than Bolin, which reminds me that we'll never see him again probably because he's dead.), and by this point, it just didn't seem like something that needed to be gone through. Ah well, I suppose it wasn't really addressed much given how clown-ish he can be, so at least it's dealt with.
Also, Ghazan can lavabend, right? Isn't that a combination of earthbending and firebending, so couldn't that sort of power be excluded to the avatar? Also, Jinorra's spirit ability is still pretty sketchy, but at least it makes airbending a bit more useful, but what with everything waterbenders and earthbenders can end up doing. Other than that, the next episodes show Korra metalbending, which, unless they do some sort of timejump, seems awfully quick. But I suppose the plot demands it. Final point, I agree with Mateos about the four villains and their power levels. Boy, if their powers were that extremely powerful, I bet making a rare exception to the anti-bloodbending rule could have been made once they figured out that Amon could remove people of their bending through the use of bloodbending. (Although it is mentioned how bloodbending is very difficult to learn, so there's the alternative of Korra possibly removing the evil benders' powers herself.. but I guess that might be too traumatic? That, and she might have to get up close to them.. while they still have their bending.. hmm)