I thought the ending was kind of dumb. Extremely anticlimactic... "oh, sorry, we were alive the whole time but were under a gag order, derp." They also never resolved the whole "Why can't she summon Gungnir?!?" thing.
Most of the last episode felt like a Final Fantasy to me, heh. Use your best attacks! Oh no, the boss transformed into a giant something! Time to use a powerup that's only accessible while fighting the last boss! >.>