Surely Cross-DC Party & Duty Finder would be easier to implement, and cheaper, than physically moving servers across a country and all the logistics issues(safety in transportation, required game downtime, possibly rent of physical locations, possible costs in hiring and paying additional maintenance teams, so on) that come with that, right? sure there are technical limitations around it, your solution would infer a much greater financial strain on the studio, which Square would likely veto immediately as it would cut down profits, plus, you are ignoring the possibility that the physical proximity of the server racks, and them being physically connected to each other, is why DC traveling is even possible, doing so over the internet could range from being significantly slower to outright impossible, at least under the system implemented.