This show started and ended with the same weaknesses. Lack of seriousness and lack of consequences. This show could have been really great if it had borrowed from Bokurano or Narutaru. It didnīt and so everything that happened was just shallow eyecandy like most anime with little girls these days.
Incidentially, it got a lot better during the last 3-4 episodes when the other girl was introduced and we saw a darker side of these powers.
Maybe the anime of this concluded season with the most wasted potential.