You know what? I genuinely enjoyed this episode. I believe it was fully S1 level, with lots of little things setting this season up to actually be slightly better than S1. Apparently the writer this time around is an Ultraman and Kamen veteran, so I'm guessing it's just taken this long for him to get through the awkward "introduce all characters" stage and will now have lots of fun just trying out the different combinations for six more episodes. This season's world is more tightly written than S1, with better setups, extended interactions, and character development than S1's "have Team Hormone hype monster of the week up" formula.
But before, the acting, cinematography, and directing were just so awkward that I just couldn't buy it.
It feels like with this episode, everyone's finally found their footing and have a better feel for the tone of the series. In particular, the acting is now up to average S1 levels, (although yet to see if they can reach Yuko and Mariko's level of dimensionality, or Rena's sheer charisma) or the writer has learned to keep Habu within their acting strengths to avoid any terribad line deliveries.
More specific commentary, SPOILERS FOLLOW:
Putting Kawaei and Kanon together is fucking lethal amounts of adorable. Kawaei's still on the lower end of acting skills, but still better than Maria, and releatively still S1 worthy. (Probably around Sansho Sisters level) But Maria's awkward with Shimada is bloody hilarious, so I'm okay with it for now.
Lolwut YagixMessi S&M ship?
It's really too bad that Rena completely ruined us for any giggling psycho characters hereafter, as even though Messi is not Gekikara at all, once she started giggling I started comparing unfavorably.
Man, overall Mongoose is a pretty kickass team. WHOOOOOOOO ANYA! WHOOOOOOO RUSSIAN! But heh, I bet Miyu is the Erena of S3, mixed with being their Dance.
Mongoose's badass strut was so good, but I do hope Habu prove to be deserving of their previous "equal to Mongoose" status, versus their punching bag characterizations seen thus far.
Hoping for Matsui Nobunaga, too.

CENTER GONNA CLEAN UP THIS HOUSE, BITCHES.