Hi Andreas,
I just read your quick and light-hearted essay. Just a couple of comments I hope you may find useful:
On the first assumption, I wonder whether you think particle physicists are attributing too many anthropomorphic properties to elementary particles. What you wrote, namely that "elementary particles "only react" seems to me in line with current mainstream views on elementary particles, and this includes the fact that they obey certain conservation laws (i.e. they only react to the constraints imposed upon them on such laws.) So if I understood your point correctly, it seems pretty uncontroversial.
On your second assumption, I also think that you may be referring to the picture painted by many popularizations of quantum mechanics, rather than what most quantum physicists think, which, as far as I can tell, is that a quantum object is neither a particle nor a wave but rather something that manifests in some experiments wavelike behavior and in others particle-like behavior. Again, your point seems to me largely in line with this view.
On your bonus assumption, I agree that there may be much more to the universe than what we can observe directly. If you'd like to see a novel conceptualization of this idea, take a look at the appendix of my paper: http://www.fqxi.org/community/forum/topic/1431
All the best,
Armin
PS. I was just in Norway three months ago, what a beautiful country! The road between Oslo and Bergen is the most scenic route I have seen in my life.