No, it's not just NA. Everyone in the JP region goes to Mana, everyone in the NA region goes to Aether and everyone in the EU region goes to Light.

Unfortunately it's not necessarily that simple to add a cross-DC PF (depending on how they go about it). World Visit and DC Travel themselves were complex and risky additions requiring lots of untangling, problem-solving and testing (this is just an obvious thing if you understand it) and that's why each of them took a whole 2 years to add. Even now, you're lucky if there isn't a glitch that causes character data loss while traveling and it's a relief that we haven't seen a massive issue with that.

I think that they know people want it as a solution because they've discussed it but they will probably be thinking of other ideas until it's developed.