*A* video game? Kinda understating things, don't you think? That's like saying "this Lamborghini is just a car".
Pillars of Eternity is a little more than that. It warrants whatever schedule change comes in conflict with it. And sleep is the easiest schedule to change anyway.
Work schedules, on the other hand, are a little more tricky. But they're one of those things that is up to the individual to gauge. I personally, did not have too much trouble asking my boss for a day off, today. Wasn't able to get tomorrow off, but that's no biggie. I'm quite OK with playing the game for 12 hours today, then taking a 8-10 hour break from it tomorrow to work, because after that is the weekend! 2 1/2 whole days to play PoE!
No, it's not an understatement. It's just a video game.