The most satisfying outcome of the book is that Nazi Germany - the decisions, the reasoning, the policies - finally... well, finally make sense, and in an overarching way. In achieving this, Tooze makes significant use of Hitler's second book, which was neglected compared with 'Mein Kampf' as events jumped forward. Thanks in part to the spotlighting of the second book, for all his famous incompetence, delusion, and hubris, Hitler is partially refreshed as someone who, despite it all, also had a good grasp of events. Take a standard view, like Hobsbawm's (p.41 of his 'Age of Extremes'):
"The mystery is why Hitler, already fully stretched in Russia, gratuitously declared war on the USA ... There is no adequate explanation of Hitler's folly, though we know him to have persistently, and dramatically, underestimated the capacity for action, not to mention the economic and technological potential, of the USA because he thought democracies incapable of action."
As Tooze shows conclusively, Hitler most certainly did not underestimate the economic prowess of the US. Relatedly, if one keeps in mind, as Tooze does, Nazi goals and if one puts all the moral issues of aggressive and total war to one side, Hitler's sound understanding of parts of the world scene make the Nazi invasions and their timing "sane". Evil and, as Tooze shows, doomed to failure, but explicable, at long last, in a coherent way.