Contract building is exactly why I am in favor of this system. Say you are an awesome architect in game, well known in fact (not me, i’m honestly barely more than average). Someone who has lots of coin wants to buy this person’s services. You can, right now. the buyer can own the plots, or the builder can own the plots. The thing with this is, if you need to transfer plots/sell the beacon it has to be done completely manually. So both players have to be present, and one has to make sure they can manually attach all the plots (without missing a section since it would then be regenerated). Not something you want to do if you spent a few 100k coins on your pretty new castle.
It does open up a lot of room for trolls and grievers to hold land around someone for “ransom” although currently they can do this already, just will make it easier to get the land from them if they were so inclined to deal.
I think a prefab system is the natural solution to both of these. You build the house/statue/whatnot in one place. A person is interested in buying it from you for their settlement. You “box” it up into a prefab crate. you trade that to them for coin. They (assuming they have the required plots and the area necessary is unclaimed) place it wherever they want on whatever planet they want (I feel that prefabs should only be cut and paste, not copy and paste, as that would ruin the allure that everything in game is completely hand built by someone). This I feel gives more power to the talented builders, and prospective buyers, without granting extra convenience to trolls.