Broodwars, it was never established that bloodbending could ONLY happen during a full moon. Just because Hama and Katara could do only do it during a full moon, no one else can? Come on. If that's the case, why aren't you complaining that none blind earth benders can learn metal bending and firebenders that haven't mastered their emotion can learn lightning bending?
The original series established that Waterbenders are at their strongest in the light of the full moon, and they're at their weakest during the day ("You rise with the moon. I rise with the sun!").
Maybe if this bloodbending was still being performed at night in the light of the moon, I could buy this, but we're having bloodbending performed in broad daylight. And not only that, but it's bloodbending on a scale where one person can control an entire room of people (including some incredibly powerful benders), something we haven't seen before.
As for metal bending, it was never stated in the original series that you had to be blind to perform it. The way Toph was forced to use her "vibration vision" (or whatever you want to call it) just allowed her to see the earth in the metal so she could learn to bend it. Note, actually, that when Toph realizes this, the Guru mentions there being earth in metal as well. As for firebending and lightning, we've seen benders in the past who have used it while being very emotionally charged (the final battle between Zuko and Azula comes to mind). It's just that the bender has to keep an internal balance when separating the forces that create the lightning.
And besides, that amount of shipping was very minimal this time and it's kind ridiculous that you had a problem with it.
"Minimal"? The "camera" must have cut to show Asami's growing jealousy towards Korra at least 3-4 times in this episode as Mako went nuts over finding her. Plus, there was her freaking out over Bolin telling her that Korra and Mako kissed during the tournament.
And, sorry, but "a lot of people like it!" doesn't make it "good". Take for instance the
ultimate in bad shipping: the Twilight movies. This show just has
enough to cover (and, with only 26 episodes, barely enough time to do it) without spending more time than is necessary on petty shipping issues.
And like Stogi has explained, the Avatar State is not a Duex Ex Machina. Perhaps if you've only seen The Legend of Korra, but it's been explained so well in the original series that the average viewer is expected to know what it is.
Even in the original series, I've never been terribly fond of the Avatar State, as the writers just seem to randomly determine what is and is not a mortal threat to the Avatar. Consider that Korra has been in mortal danger several times during this series, and she's never entered the Avatar State (and, no, I'm not buying the whole "well, she's just not spiritual!" excuse when it comes to an automatic fail safe like the Avatar State). Plus, when it
is used, it just feels a bit cheap because it doesn't feel like the Avatar actually won the fight on their one (which is why I really liked that Aang refused the Avatar State during the final battle, as he wanted to win on his own terms).
You keep looking for reason to dislike this show and it's, quite frankly, pretty sad.
Yes, I
clearly dislike this show, which is why I keep watching every episode; eagerly look forward to the show
every week; and have viewed every episode favorably so far.

Sorry, but the writing in this series is just
not as sharp as in the original series. Avatar: The Last Airbender set the standard pretty high, and this series just isn't quite measuring up as well despite being an enjoyable series in general.
You keep looking for a reason to translate my "criticism" as "hate" (and not just on this subject) and it's, quite frankly, pretty sad. Now if you're satisfied, Don Quixote, I think there are still some windmills out there for you to chase.