Great article on systems engineering. You are dead on on many of your observations.
As a former President of INCOSE ( International Council of Systems Engineering) St. Louis Chapter I have to say that SE is a very complex discipline by itself and like psychology there are a lot different point of views and theories.
SE practitioners can spend many many hours discussing the finer points of a complex versus a complicated system, or a discussion about if there should be a BS degree in systems engineering.
There are still a lot work to be done to mature the discipline, and I recommend all the young SE to join your local INCOSE chapter and be active:
http://www.incose.org/
To me one of the best examples of a System Engineer, is a 9-year old kid in East LA:
http://cainesarcade.com/. He took a simple concept and ran with it. Today there are many young engineers replicating his process of developing arcade games.