I don't think automatically queueing into the "next" dungeon (how would the system even determine that on its own without some sort of input from the team) is feasible but turning the party into a cross-world party upon exit for those who choose not to leave, maybe? It would all depend how things work on the backend when someone exits an instance. But they do have the Contact list so there is some precedent that the game remembers you were together and that might be something to build on. All dependent upon how the database and code works together currently and none of us really know that.