ohh, i like the Night battle themes. also nocturnal only mobs also.
post 20 or 30 areas, i have run into aggro heavy areas. so, theres areas are out there. staying on the main road, you dont get too much of it. main road danger could be argued in so many ways.

all in all, i am defintely for the addition of nocturnal only mobs, and "more" danger in the realms of Eorzea. seems to make sense, the danger would increase the farther you are from cities/towns