I asked Bill once about Matinicus Rock, why they had made it with the one lantern room gone. Can't remember his exact answer, just that that was how it looked during the time frame they wanted to depict. As far as Stage Harbor, or any other lighthouse that has changed significantly, I guess it's up to HL as to what time period they represent. If they can put the keepers back on lights that have lost them, they could certainly put a lantern room back!