A much better dramatic choice, which the adventure doesn't really touch, is whether or not to stop the human sacrifices. Human sacrifices are bad, but the Sephek Kaltro situation suggests that screwing with them can cause Auril to retaliate. So the question of whether or not to try to stop them is an interesting one for the players, because arguably until the Rime is lifted, the sacrifices are a necessary evil. The adventure is no help in this area though, since it includes zero info about whose idea the sacrifices were in the first place, and who is in charge of them.
Not to mention, a lot of the leaders of the towns are portrayed as good and moral people who probably wouldn't okay this unless they had proof it was the only way to survive. Also, none of the town descriptions take this into account--NPC's are generally friendly, eager to chat and worried about things like elections for a new speaker or missing iron shipments, they never seem like desperate apocalypse survivors who would probably offer the PC's as sacrifices so that they don't have to risk anyone they love.
It makes a lot more sense if the towns with weak or evil leadership start trying sacrifices ("no, it's fine, we're using condemned criminals, promise!"), and it escalates over time, egged on by agents of Auril--they make offerings of food, then warmth, then humans as the winter gets progressively worse. For me, it's another reason to have the story start just as the winter starts getting really bad, so the PC's can actually witness this decline, and maybe fight it themselves.