OK first I should mention that I only finished the prologue so that must be why it was so easy, but will the difficulty significantly increase for now on ? Even the supposedly tough monsters (the ones you can chose to leave alone) and the last boss were just begging to get their asses kicked (the thief who keeps healing herself even though she already has 100% HP while her pals are almost dead...). Both characters were lv12 when I finished the prologue so I don't think I overleveled.