If they don't end up adding a day/night cycle then it'll be pretty disappointing. It's 2020, Larian has grown a bit since DOSII and different monsters/races behave differently at night. I hope they've at least added the potential for camps to be attacked at rest and for certain races (Elves for instance) to gain advantages at night since they require less sleep and have better night vision.
Sorry man but they want this game to be as true to 5E DnD as possible.
That's what I'm saying though, 5E has nocturnal creatures, certain races have better advantages at night time, etc.
The 5E ruleset has certain races with the racial trait of "Darkvision" and Elves have a racial trait of "Trance" in which they get the benefits of sleep that other races get, with half of the time and not truly sleeping. Night time is even a part of 5E.
If they want it as true to 5E DnD as possible, they'd have certain occurrences at night time, if not a day/night cycle, then at least something involving the camp system.
Edit: I'm glad we've been able to converse without the drama that's been going on this forum BTW. It's appreciated!