I agree with "johnlewis", who said that there is a lot going on between the lines in this film. While I do think the pacing of this film could be improved, I do think that the complexity of the relationships between the characters is fascinating.
Examples :
Pierre is going to marry his cousin, even though his love for her seems very cousin-y ?
Pierre and his stepmother have a rather...curious relationship.
Pierre, Lucie, and Thibault seem to have a triangular relationship, and the actual points to the triangle are not quite certain...
Lucie's brother is a bit of a eunuch, or is he ?
And Isabelle, who is she really ??
Overall, I think it was worth my time. An interesting film, and one that makes me want to read Melville.