As a HUGE fan of the Ultima games, I was among the firsts to complain about the lack of a day/night circle in the first game (a future that was announced during the KS campaing, to make things worse).
Then, I realized that there is at least one technical issue that prevents Larians to add this feature to the game: the co-op campaign. Specifically, the chance for one player to get involved in a turn based combat while the other(s) is wandering the world in real time.
With a day/night circle in place, and the aforementioned possibility, you will have absolutely moronic scenarios where several days pass while one player is stuck in combat.
Yeah, they would definitely need to add a "gather your party together first" mechanic in order to have a hope of making it work. With the emphasis they want to put on independence in DOS2, not likely something they would want to spend time on. Could be an interesting mechanic for a mod, but day/night cycles are already a pain in DOS and I think it's unlikely to change much in DOS2. If you add NPC schedules to the mix, fast forwarding becomes even more tricky and requires a very well thought out design up front.
