Personally I think it's not cheating at all. Although the AI is not very smart in general, it can have its moments. Especially at high difficulty levels (immortal or deity) on huge map settings, the ribbon is quite helpful for the human player on where to focus your actions. The early aggression from one of your neighbors is almost guaranteed. But with this tool you can influence if the actual DOW really happens (build up military or block enemy units paths) or even from whom (work to please so. agenda while deliberately ignore others...). As already stated: The AI uses this information all the time to evaluate its actions. Its only fair that a human player has at least the same data for evaluation at a glance. However: I like the idea to attach the information depth on diplomatic visibility, scouting, spying etc. That would bring an extra layer into the game which is quite interesting for the more advanced player.