I'm going to go ahead and refer to this as the "ED arc" because this season is a little bit more laid-back than the first.
The anime has moved through its original material very swiftly. Season 2 has a stronger emphasis on character development than the earlier, more action-packed Season 1. As it prepares the series for what comes ahead, it is a welcome change of pace.
The OSTs are fantastic, with spiral by LONGMAN standing out as a personal favorite. The animation is still great as it always has been.
I wouldn't say that I would really recommend this season if you were hoping for more action after season 1. Even though there are differing opinions about this arc in particular among fans, as a fan of the series, I'm generally satisfied.