So many people (me included, on page 12) tried giving them ideas, we still don't have an official answer or acknowledgement from Larian and probably won't get either until the full release comes. And by then its too late. Don't waste your precious brain function on this topic, sadly its over. We got paladins and the reaction system to worry about now.
It was over as soon as the gameplay was revealed, a day/night cycle is something you plan very early in development. If it wasn't there then, there is strictly no chance for it to be added later.
