Imagine how shitty it will feel to reach Baldur's Gate, start moving across its quartiers and streets... And realize how that will also be constantly frozen in a single moment of the day: no night lights, no vampire ambushes in dark corners of the city, no shady thugs hanging out in some alley, etc. A constant mid-day, across the entire city and its surrounding. For the entire playthrough.
What a bummer that will be.
I would deduct 40 % from my review. If it were a 100 % game it would get 60% in the end if there is no day n night cycle