Some good ones, some bad ones. In Germany, mainly the wrong ones. German strategists have lost so badly focusing on the schwerpunkt that the 'winning' strategy is a war of maneuiver, from where they stand. That means, on the one hand, a strategic vision of blitzkrieg, but on the other, a focus on speed at the expense of weight. Germany will begin the next round with tanks that are too light for the modern battlefield, guns that punch too little, obsolete long-range cavalry forces, and a fleet of high-altitude bomber airships that are not survivable.
Nice storry so far.
But in the quoted part I see some problems. Yes the Germans could come to the wrong conclusions. But the utter failure you paint in arms procurement Imo could only occure if they shut out the other powers.
Because if they see others build bigger, better things they also will feel the need to experiment. Not neccecerily in the same class, but the guns surely will also grow.
Also the "Northern Front" will most likely lead to the "British" infantry and cruiser tank paradigm. With at the time could be right if the machines are mature and propperly integrated.
Also the airships. They should be aware of the shortcommings. Weather and so on will conflict with aims in this war too, so a heavier than air design could also emerge. As in this war the first should be there in the recon role.