Stylistically speaking, her story arc was done. She got her place in history, retired to the country, and watched way too many people die. She was tired, and she was done. I kind of imagine her holding up a middle finger, yelling FTS, I'M OUT, LOSERS.
I'm kind of wondering what they'll do with fourteen more hours of screen-time, though. Safe bets: Bjorn being broody and cheat-y, the women having ALL the strength, politics making dudes hack-and-slashy, and Ivar being nutbars cuckoopants all over the continent.
I'll also be miffed if we don't get back to Greenland, even if it's just to