I'm sure the answer to this must have come up at some point but I can't recall reading it.
Sargeras needed a massively powerful portal opened so he could fast travel to Azeroth, but what about the other members of the Titan Pantheon? They discovered and Ordered Azeroth and then moved on to meet with Sargeras, did they make use of a similar portal to reach him? Or having found Azeroth, are they able to more easily return to it (did they set their hearthstone there or something?)