My two pennies worth: Jeanne Dielman is a landmark feminist art installation piece, no question, and in terms of groundbreaking feminism, is obviously a more important work. But my sainted trousers it's a chore to watch. Once is quite enough.

Barbie on the other hand is a lot of fun and I'm sure I'll watch it again. I don't think it's a masterpiece, nor do I think it's terrible. But it is a entertaining, zany, often funny watch, and I do think it makes at least some effort to engage on gender politics (the monologue about contradictory cultural expectations of women being particularly interesting, despite it being rather on the nose, as you point out). :)