Cost of owning towns seems to be discouraging nations from going full throttle conquest. I hear it over and over from different clan leaders and other nation players "we have enough towns". Today for example we couldn't get a group together in our nation to flip a town because no-one wanted to own the cost involved. If this was remedied i do believe the activity in the game overall would increase dramatically.
Suggestion: A small percentage reduction in town ownership cost for each town owned (excluding non capturable) by a Nation. For example nation A owns 20 ports @ lets say .75% c