The current state of emissaries is problematic. The city states can be far from the player and often the emissaries can't reach to them due to open borders restriction. This mechanic can ruin a diplomatic strategy and cause frustration. These emessaries should be able to cross borders freely, just like missionaries cross borders. Attrition damage could be applied so that the emissaries exert less influence the longer they stay in foreign territory, again just as it is with the missionaries. Currently due to lack of open borders my missionaries idle. A whole stack of them. This is not cool, boring, and ruins diplomatic strategies. And it is not realistic either. Emissaries have diplomatic immunity. Plus they are not hostile military units, they are civilians and they are only transiting to a different destination. If they can cross borders this would make for more interesting games for those who like to pursue city-state strategies. I noticed that archeologists also cannot cross borders. This is not cool mechanics as well. Too restrictive and leads to idling and boredom in the game. I think they should be able to cross any borders freely enroute to a different destination, but if they want to excavate in a specific foreign territory they should have open borders agreement with that Civ. I believe civilians should be able to freely transit. But if they want to do a specific action other than just transiting, then they should have open borders agreement.