Long rests are supposed to be a minimum of 8 hours. Again, it doesn't have to mean exactly 8 hours, so it could be that one long rest at one point is 9 hours while at another time you do exactly 8.
Not particularly arguing for or against a 2-long-rest-per-day system, but if Larian did change to this system then they could just as easily change the durations of short and long rests.
-short rest? 20 min
-daytime "long rest"? 2-3 hours (nap and/or lunch)
-nighttime "long rest"? 8 hours (7 hours sleep + 1 hour of camp-things)
2-3 short rests + midday nap + 2-3 short rests + long rest = 13 hours at most. Given that things like eating and peeing are included in resting, and adventuring is exhausting, an 11-hour adventuring day is already too long. Doing moderate to strenuous exercise, exploring or fighting, for >10 hours a day sounds brutal.
