My personal Idea's from the beta.
I think that their needs to be *Later on mind you, I'm not demanding it now.* Someform of engineering/construction unit with the ability to build towers and forts for defense lay down roads and of course build outside resource centers like small settlements ontop of resource sites.
Say for example i found fertile farm land outside of my citys reach but inside my land *inbetween cities along the road or something* I would like to be able to build a farm and a small village there/farming colony to farm that would only consume asmall amount of the food and send the rest along the way to my other settlements/cities as such the trade would encourage gold taxation as well therefore generating food and gold similar to a small settlement of course creating such a thing requires a small investment as well as guarding it etc.
Anyone else agree with this?