So the Germans threw away the significant advantage of a neutral Switzerland for a 'morale booster'? There were far easier targets to be had in the fall of 1941 which would have played to the German and other allies forces strengths such as attacking Sweden-or even Spain.
Um, what's the strategic objective in taking Switzerland?
It's not got much in the way of natural resources like oil, iron, and the things one needs to fight a way.
It's not a strategic threat - it's neutral and avowedly so.
It's not a stepping stone on the route to anywhere. Germany has clear land routes into Italy, and gaining Switzerland wouldn't improve this one jot.
On the downside, attacking neutral Switzerland is a damned good way of getting neutral and non-involved powers (Ireland, Sweden, USA, even Spain) to join the wrong (from the German point of view).
Switzerland does not have good terrain for any attacking force. The resources required for a full-scale conquest are going to be a strain. The method described
is going to be expensive in terms of men (if attacking with infantry) or really expensive in terms of artillery shells. Progress is going to be slow; launching the attack in September 23 and finishing in November 30, well, the word optimistic applies quite strongly.
The key event, from the German POV, is going to be the attack on the Soviet Union. Switzerland is a horrible distraction from that.
I chose Switzerland because of the fact that Hitler, and many other Nazis, consistently stated IOTL that they wanted to invade Switzerland, and indeed made that clear in public, even in front of foreign dignitaries (such as Italian diplomats, and at one point Mussolini himself).
And believe me, in this timeline, Germany is in quite a need of a morale boost, having bled significantly during the Battle of Britain - and with Operation Barbarossa delayed until 1942, when Hitler ordered Tannenbaum to be commenced, he believed that the invasion would be quick, and result in minimal casualties.
Although, if specifics of the invasion (i.e. speed of the conquest) are too implausible, then I am willing to change that.