The narrative value of fight difficulty is a better argument than anything else, and one I wholly agree with. Zodiark is pretty difficult for a normal and it makes the experience better- so were Shinryu (which was by far the hardest story trial since I started playing), Susano, and Nidhogg. Hades, Hyedalyn, and Endsinger were far too easy given the gravity of their fights and it made them less cool outside of pure cinematic flair. I don't think EVERY fight should challenge you that much, but it should where it's appropriate. The dungeons this time around are much harder than the trials and I really don't think that's appropriate.