Originally Posted by
Jojoya
Cross worlds hunts prevent a tiny group of players controlling the hunts on their world and locking out the rest of the community. We already see that on worlds that run trains on a strict schedule. Those who can't be online at those specific times of day miss out. With cross world, they have the option of joining other available hunts.
Congestion is always going to be a problem during new content releases. It happened before world visit was added in Stormblood. It will continue to happen as long as players have a virtually unlimited source of currencies they can farm with little effort required on their part.