There should be a new island added just near mainland that is only accessable by boat which is built at a boatyard which when upgraded to a certain level turn into shipyards. on this island you should find the luxury items such as exotic wood and granite to harvest. access to build a boatyard however should be restricted to lvl 36+. upgrade the boatyard to increase the capacity of your boats maybe and use dock to manage ship inventory. however, before your able to harvest these resources there should be bandits there to conquer where you will have to build a boat as well as an army to attack. the shipyard could well come in handy for future pvp too as well as campaigns. just a thought.