The lack of night/day cycle is a real heresy, a true immersion breaker. What reason can justify such a choice, except the copy/paste of Dinivity?
I think their reasoning has been spelled out fairly clearly earlier in the thread.
For starters, they indicated that the complexity of their story-telling would go to some very problematic places if they added another dimension (day/night). If you take a moment to think about how much more complex the behaviour of each NPC has to be during a fully realized day/night cycle then it's not too hard to understand why they might not want to chew on those particular problems this time around.
Having a convincing "night" would not just be a matter changing the lighting. For starters NPC's would have to have more complex schedules and actions, there would have to be a bunch of additional NPC's to populate the nightscapes (different guards, inn/bar keepers and patrons, monsters would be expected to do different things at night, etc.)
That said, while I respect that might be a bigger mouthful to chew on from that perspective, I do think they could certainly start introducing some "scripted" night events and side adventures. Some "not so random" camp encounters might be a nice place to start with such a thing... anything to start laying the ground work for a more convincing illusion of a day/night cycle even if the entirety of their core persistent world isn't constantly cycling.
