the consequence of being set on your movie having no subtitles is that the plot has to still be relatively straightforward if you don't want to completely alienate everyone who is not well-versed in your language. i actually just don't think the plot is that substantive and i'll agree with your point that many of the characters come off as interchangeable.
interesting point about the nudity. iirc it did come off a bit 'harsh'
the film to me is more about the experience than anything else.