Suggestion: Party with specific people from other servers? (for instances)

Sorry if this is in the wrong place, but I didn't see any suggestion forums in the English section.

It would be nice if we could add players from other servers as friends and at least do instances. I have friends from multiple servers and so there is no way that we are all going to get on the same server (I already convinced a few to consider moving over to the server I'm on, but those are the ones without established characters).

Now, with the Duty finder, you can party with people from other servers. So instead of forcing us to randomly hop around trying to get into the right party, it would be nice to instead simply go: Add friend from another server. Invite friend to party, join dungeon.

Instead of the current: Choose dungeon. Get everyone to start the same dungeon via duty finder. Hope you all get into the same dungeon.