I think the three hour window per expedition for Be’lakor’s influence is a bit unfortunate. Why? Because 3 (hours per expedition) x 4 (campaigns) is a divisor of 24.
Or in other words, if you play each day at roughly the same time, there is a chance that Be’lakors influence is always on the same expedition which decreases variety. Either you have to play always the same expedition if you want Be’lakor or if want to avoid it, one expedition is blocked.
A slightly different time frame would elevate the “issue” like 3 hours 20 minutes or 2 hours whatever.