The 1944 endgame map does need changing it becomes to imbalanced when players go inactive.
The 25 player historical map literally covers the whole whole during the 1939 period I assume make it bigger means add more provinces, which I think would be a mistake seeing as it would drag games on longer and wouldn’t fix the problem you mentioned earlier where theres only 3 or 4 people active after day 4.it would only make it worse for the people who are still active
But adding a railway to move troops across the country is a good idea but I think that’s what infrastructure is supposed to represent but it costs so much to put in every province
But changing the infantry system to me doesn’t make much sense as it would still be same gameplay just different attack/defence values.
The infantry unit is used to represent the standard foot soldier it doesn’t matter what gun you use a bullet will generally do the same amount of damage to another solider and the same amount of damage to armoured units. The current system represents this well as it is.
The only way I’d like to see your idea implemented is if they made more detailed battles. Like zooming in to a city and switching to a city map commanding your troops through the streets securing buildings etc. That’s the only situation I could see multiple class of infantry being useful such as being able to use lmg soldiers to suppress fire or place snipers in buildings.
But I can’t see that happening
That’s just my opinion anyway