You're a bit late with your warnings, I watched the latest episode almost two days ago.
Average anime? I don't watch that. I watch only good anime, and their animation is almost always way better than that of Avatar - though it's gotten better since the first season.
Angst? I almost didn't notice, there's so little of it compared to most anime series. Actually, I think it's good that we're finally properly getting into the heads of the "bad guys." That's one of the reasons why I like the third season so far way better than the two earlier. I think the episodes are also even more imaginative than earlier, and much more atmospheric (for example the second one in the season, where Aang organized the dance party - my favourite episode in the series). Atmosphere is very important to me. Generally I don't like angst, but if it's done right, even it can add positively to the atmosphere.
By the way, since when has
Azula been angsty?

"My own mother thought I was a monster... She was right, of course, but it still hurt." <That's pretty much her only angsty line so far.
"You lopped his head off? Struck through his heart? Don't think of him as one of those vampires. He won't die from just that." - Sir Integral Fairbrook Wingates Hellsing