This will be a more problematic issue in future updates, where to be able to use / view new content, a area of the map must be un-discovered. Since we are in EA, players must be open to ditch old worlds, and start over, from time to time.
A solution would be new worlds has much more water, so IronGate can "spawn" in new landmasses, for current players in old worlds to explore again. Or player made workbenches not visited within 5 days ingame, will get destroyed, and map outside 2000 units of any Workbench will go back into the fog of war, and IronGate can once more re-populate the game with old and new features under the fog.
IronGate could also include a easy script in the update/patch procedures, to make copies of world and characters, so player can roll back (not game version) if needed.