I think that because there are no grand statements nor tragic events that this film is being ignored as a mere trifle of pseudo feminism. Marginalization is not something that one immediately considers as the stuff of academy award winning films... this is not the female retelling of 'Dead Poet's Society', this is a story about the indoctrination and marginalization of a population that, for the purposes of a very masculine, patriarchal, and militaristic set of circumstances aka WWII, had the opportunity to taste the sweet fruits of freedom and choice for a very brief but calamitous moment in time and then chose to claim that freedom as manifest destiny much to the chagrin of the order of the time that expected that, like the subservients that they once were, would simply slide back into their previous positions as caregivers and abuse takers.
Review of Mona Lisa Smile
