If there is no hard evidence available and, after six and a half decades have passed, no one left alive to corroborate even the rumors and suspicions regarding the possible assassination of General Patton - which I do not rule out as a possibility - I cannot see the point of attempting to pursue this very cold case. However, I do see the value of understanding the unseen but active forces at work that you refer to as "the war above the war".
I believe that, on a practical basis, attempting to generate interest in such an old, virtually unprovable case of possible assassination of an American hero by either the U.S.and/or Soviet government is basically futile. Still, I understand the interest and do not reject the premise of assassination, only the reality of ever finding the truth after all this time. Investigations such as this need to be performed close to the actual act, not decades later. Because investigations of this (and other) suspicious deaths of American heroes were often successfully 'controlled' and/or thwarted at the time they occurred, making further investigation ineffective, attempting to re-start an investigation into General Patton's untimely, accidental death seems like a Sisyphean task that I can't see bearing any real conclusions.