I am from a Catholic country, but El Crimen del Padre Amaro wasn't that brilliant or controversial either, at leat for me.  It's an old story here; but I'm not sure if it's the same in Mexico.  Well-acted, yes, but again, the plot is so mundane.  You don't feel for any of those characters.  I think Y tu mama tambien is overrated also; it's good, but not awesome.  So there were some political issues tackled in passing, but still only in passing.  It's a teenage soft porn road movie with Mexican actors.  I'm wondering if they cast American actors if it would have the same effect...probably not.   