I agree. I'm lucky that I didn't watch the episodes in order, because if I had started out with Decalogue I, I probably wouldn't have gone on to watch the rest.
To me, it seemed the father spent a frustratingly long time evading the truth, that his son had been involved in an ice accident. He spent so much time just walking around the apartment block! It didn't occur to him that everyone was indirectly telling him where his son actually was.
I think the Commandment tackled in this episode was a particularly hard one ("thou shalt not have other gods before me") if the writers didn't want to moralize about what the characters should do. I didn't really feel empathy for the father for relying so highly on logic and science. Maybe my copy was visually dull, but the ending confirming the son's death didn't strike me either.