I believe one of the biggest turnoffs for the game for me is how much information seems readily available and how much more politics & trust/backstabbing is open. I'm sure many enjoy that aspect of the game but one of the biggest appeals of Travian was the use of Scout troops and how some players even devoted massive amounts of resources to utilizing them efficiently.
There is a certain amount of appeal in not knowing. For a smaller realms can be quite discouraged to continue playing if they actively know just how much their next door neighbor dwarfs them. Bigger realms could gain more defensive aspect of it such as catching their potential NAP scouting their territory. Troop concealment could add some depth to attacking and open up two big realms to PvP where if one has element of surprise wheres otherwise they might just ally against smaller realms for orbs.
Still fairly new to the game so I'm sure those who played a few rounds could explain why it would be a bad idea?