My suggestion would be to add some Allied influence into Belgium, maybe even the Netherlands.
In my current 1.0008 game against the Axis AI (xpert level) i played aggressivly, once the AI kind of ignored some of polish units. I nearly conquered Slovakia with them, forcing the AI to move units out of poland to stop me. Poland only fell in November 1939.
But when it fell, France suffered a morale penalty, while the Germans celebrated that Danzig came home into the Reich. No word about the loss of the most important german industrial center in western Germany, taking place at the very same time.
Because of this advance, i declared war on Luxembourg and attacked the German soil through this bottle neck.
It is december and i hold Essen, Düsseldorf and Dortmund. This attacked weekend the German campaign in Poland, too.
At least that is what I guess.
I think it is a pitty that the game offers NOTHING to players who take an early, aggressive stand against the Axis.
No "yay, we took the Ruhr". No pop National Morale gains for Poland (our Allies come to our help, horray!). No reaction from other neutrals (Stalin notices with interest the German weakness).
If you want to add a bit something to surprise your wargame-experienced customers about how far you have thought, you might want to think about this (see above) and comparabel situations, while taking a new, different point of view on the overall situtation.
Please don't get me wrong. This wasn't written to tell the world how great my genius is, but to bolster my other point in a different discussion about following a too narrow path (scripted invasions, single sided point of view because "it happened like this in history").
I know that you're doing the very best, take this as a simple encouragement to keep up the good work, and as a hint where to maybe look next.

					
					













