It is no use expecting Dew Prism OST to be a grave spectacle as are most Square soundtracks. You must notice that the substance of this game itself is positive and mild, not epic nor serious. To fit into the theme, Junya Nakano made this refreshing music. You might regard this OST as shallow and dull. But this guess is wide of the mark, I think.
Every track is successful in producing fine effects of light and shade.
It never becomes superficial. Even comical tunes are somewhat composed. There are various motifs present. Then there are the great dungeon tracks. They are so vivid and cool.