This does not prevent the СoW-maps being more accurate.
watch the "claimed" as honestly I agree with you that some historical and geographical accuracy spices up the game for me personally. And even if thay as company decide to balance... the game could be equally well balanced with a bit more regards to history, culture and geography. Now the range of the railgun is however to my knowledge based on the "Paris Kanon" . Which gets pretty close with it's 130km range. For unit range I do believe that it would elswise require the maps to be zoomed as you need to have some more specific movement if you make them to realistic then arty would be pretty useless