I absolutely love DC travel... but equally, they DO need to enable cross-DC queues, for both PvE and PvP.
(If they did it for PvP, we might actually get to do Rival Wings more often than when "Big Discord Group is scheduling a time, on these evenings, come fight!" Unless there is an Irregular Mogtome event going on, about the only time you can maybe get enough for RW is when the Discord groups set something up. With cross-DC queueing, it would help a lot and we might see combining a few people from multiple worlds/DCs upping the amount of times RW is actually playable---as in, they have enough people for queues to pop.)