Hopefully, where reinforments can be placed will be improved. I have always had a problem with the idea of USA placing 40 new divisions in recently annexed Bulgaria. Shouldn't reinforcements be placed in the original home nation territories. Some of a countries territories should also be unavailable for new reinforments. Gibraltar, Guam, Tiawan, Singapore are all examples of places where troops must be shipped in. An exception to this might be placement of militia units and even they should have a limit of how many can be built in a territory. The USA had to ship almost every unit from the continental USA to the front lines. Same should be true for Japan and to a lesser extent UK and France.