If you are talking of hunting LS, all of mine did become dead when everyone switched to CWLS. Which seems kinda normal since when you change worlds a lot for hunting, the normal LS have the huge disavantage of not being usable anymore most of the time.

As for PF and DF being worldwide, i don't think that's gonna be a thing soon when basic data center travels have been delayed. It could also lead to tons of ping problems trying to avoid all these aoes in a busy instance if you begin to be paired everyday with people living at the other side of the Earth.