I have spent a few days playing the Road to War until stopped by the "Waiting for other Civilizations" bug have discovered an number of issues:
The Kiel Canal is missing. Naval units in Kiel should be able to deploy either to the North Sea or Baltic. As it stands now you can only go to the Baltic from Kiel and must circumnavigate Jutland to get to the North Sea.
Airplanes cannot sink ships or wipe out air units and the same is true of naval units. While it makes sense on land that air power cannot completely destroy land units and you need to use a land unit to occupy territory this concept makes no sense with regards to air and naval units. Naval and air units should be able to completely destroy other air or naval units.
There is no way to engage in counter-espinoage at home. You must always go to the other country and peform a counter-espinoge mission. I think you should be able to do counter-espinage at home, but at a lower effectivness since it is directed against ALL countries rather than a specific power as a counter-espoinage mission on another countries soil will be.
The lack of open border agreements and cultural borders often negate military conquest by marooning units and cities in a sea of tiles belonging to another power. Military units should be able to negate cultural conquest of tiles immediately after a conquest WITHOUT starting a war with neighboring countries. As it now stands one is often encourged to attack neighboring countries just to get access to newly acquired cities. It also gives undue advantage to neighboring countries when you take out another nation, indeed, neigboring nations often make out better than the conquering nation.
Airplanes should be able to counter subs and intercept surface ships. As it now stands surface can intercept airplanes but not vice-versa. Subs are also immune to aircraft. Neither of these are very realistic.
The Kiel Canal is missing. Naval units in Kiel should be able to deploy either to the North Sea or Baltic. As it stands now you can only go to the Baltic from Kiel and must circumnavigate Jutland to get to the North Sea.
Airplanes cannot sink ships or wipe out air units and the same is true of naval units. While it makes sense on land that air power cannot completely destroy land units and you need to use a land unit to occupy territory this concept makes no sense with regards to air and naval units. Naval and air units should be able to completely destroy other air or naval units.
There is no way to engage in counter-espinoage at home. You must always go to the other country and peform a counter-espinoge mission. I think you should be able to do counter-espinage at home, but at a lower effectivness since it is directed against ALL countries rather than a specific power as a counter-espoinage mission on another countries soil will be.
The lack of open border agreements and cultural borders often negate military conquest by marooning units and cities in a sea of tiles belonging to another power. Military units should be able to negate cultural conquest of tiles immediately after a conquest WITHOUT starting a war with neighboring countries. As it now stands one is often encourged to attack neighboring countries just to get access to newly acquired cities. It also gives undue advantage to neighboring countries when you take out another nation, indeed, neigboring nations often make out better than the conquering nation.
Airplanes should be able to counter subs and intercept surface ships. As it now stands surface can intercept airplanes but not vice-versa. Subs are also immune to aircraft. Neither of these are very realistic.