Wouldn't it be interesting if players weren't able to check other player's railway network? Unless, of course, they are members of the same association.
This, coupled with not being able to see which players have connected to a city, unless of course you are connected to that city as well, would make this game more strategic towards the end game. You would still be able to see the population of a city, in terms of numbers, but not exactly which players are connected until you reach the city.
Right now it's easy as hell to figure out where an association is playing the end game and kind of defeats the purpose of having a strategy to begin with.
What do you think?