If I had to guess it's hard to make people GM outside of work hours.

My guess is since AH is Swedish they want to make sure it’s during the workweek so they have staff available.

Why would there need to be a GM on for an ongoing MO that's just going to hang narratively afterwards? They wave narrative wands all week but can't put their finger on the scale enough to see that their biggest event lasts into what's the first weekend of summer for one of their core demographics? Just time it so it's ending as you're coming into the office on Monday if that's the concern.

And I'm sorry, but it's a live service video game with supposedly millions of copies sold. The idea that you can only participate in the narrative peaks during Swedish business hours is lame.