Jaune, Nora, Ren and Oscar do not appear; due to them being away on a mission.
The first level has a song sung by Casey Lee Williams as background music. It plays over rue credits.
The Arrowfell facility was likely destroyed by Penny and the Ace Ops after the story; no point in repeating the mistake of leaving the technology around for others to attempt again.
This story gives a glimpse just how much Ironwood is disliked by those who work with him. And detest his methods.
It's shown people not living in the capital have Nordic themed villages.