I dunno Hollow Bastion was basically like that... kinda.
Anyway, blame Hans if anything. He's such a dull character that the scenes involving him seem to be equally boring by association. I mean I haven't done much with him yet but that's only because there's hardly anything to begin with. Even in the movie Hans just failed to be interesting. I'm still holding out hope that the world will pick up once the gang actually goes out to start helping the kingdom with its problem (ie find Elsa and Anna) but until that point we're stuck with Hans.
Not to post any spoilers, but I'm actually still trying to figure out how I'm going to write in a Boss Battle since Frozen completely lacks those kinds of elements. *sigh*