Id be happier if diadem had a wide assortment of rare gathering items, seems to me theres only 1 mineral a miner can get besides pirate spoils, that it cant in the forelands, tbh. But yeah the airship issue is sort of sad, unless your fc has 4 airships, they may still be sending them on levelling trips and map unlocking trips. If not, theres no reason not to have at least one available for diadem runs