Consider, too, expanding the area that Germany has available to conduct in USW in. The Mediterranean was a place where CP subs were incredibly destructive, well out of proportion to the their numbers. This would force Britain and her allies to spread out their naval defense, as it did in reality. Also, it would give the CPs an opportunity to attack more sea zones, inflicting IPC damage over a wider area than the North Atlantic. Might also want to consider expanding who can conduct USW, as the Germans launched U-boats out of Pola in Austria-Hungary,
When I get some time tonight, I will throw some potential rules everyone’s way for trains and movement. Outside the scope of this thread, but I had an epiphany. I will just say for now, why not replicate naval transports on dry land, in a matter of speaking? With that said, don’t think in terms of money, but in terms of infrastructure…