First of all, reviewers, please tag your spoilers. (Some did. One of those who didn't, Christmas-Reviewer asks why he gets reported - well if you are always putting in spoilers without marking it, then maybe that's why. No I didn't report you.)
My primary complaint is how slow this movie is. It's supposed to be deep and deals with real problems and emotions. It's still slow.
There are a ton of holes and inconsistencies. At the beginning, 5 vehicles skid and crash or nearly crash within a couple minutes. They throw a flare or two and leave all the cars. No one calls the cops. So no one else comes upon this pile up for the whole night? The wife and mother comes along a little later, crashes in a different place, yet all were within walking distance of the church in a blizzard. Another one is what the kid does, plus as we see him walking along near his house, much of it is on streets and paths where there's not enough snow for his feet to make an impression . The insulin incident, as one reviewer pointed out, is indeed backwards. There seems to be one little fire between two floors, yet they all walk around like it's not that cold almost like there's central heat.
None of the characters are paragons. All of them have issues they're dealing with. In fact many of them are not very likable at least at times. The young wife complains her husband doesn't treat her respectfully, but she does act like a child. Even so, he borders on mean to her. The "rich" couple are a stereotype of just that and bicker, bicker, bicker.
The movie ends with a speech and a mini-sermon. Nice thoughts but they seemed like so many words..
There's a couple of Christmas songs by Aaron Pearl, one apparently original.