I'd rather it just be a fixed cycle. I don't want it to be night after every single extended fight.
The question is, would you rather it remain static? I'd prefer a fixed cycle too, but they've already said they aren't going to do that. They've built some mechanics that they consider important around not doing that. Provided the outdoor scenery they've built looks acceptable to them, as lighting conditions change throughout the day, this wouldn't interfere with those mechanics, and would only require a small amount of code.
I didn't suggest a value for the scale of the ratio between fatigue and time of day, as that would have to be adjusted through playtesting, but the code involved would still be quite simple.
