Well, the main reason we are there is because of Garrosh and the Iron Horde. He is trying to help connect their timeline to ours. Once we defeat the Iron Horde and disable the gate, would there be any real reason to remain there? I mean, its safe to assume that the burning legion eventually pops up there to destroy Draenor, but that has nothing to do with us or our timeline. So why would we want to remain there?
Now I get to Nozdormu. Where is he? Here we have Garrosh royally screwing with the timelines and alternate universe, yet we see no sign of the bronze dragon flight. I know in Our timeline he has lost all of his powers, but there is some form of him that still retains his powers and guardianship over the timelines. As is evident by us being able to destroy his corrupted self in cata in the dungeon. So where are they in all of this? Why are we the ones to clean it up instead of the Bronze Dragonflight. Why are they not destroying the connecting portal?
Last, what about our homeland? Don't forget, there is a still very real threat of Queen Azshara and the naga who did manage to capture a elemental lord. There is also the possibility of an unknown force with Wrathions Message. Do we just leave our home land all alone? Especially the horde who just suffered heavy losses due to Garrosh and having to deal with him. Do we have no one protecting our own home?
Just a few lore questions I feel should gain some discussion since at least the Bronze Dragon flight should be a thing and its absence is strange to me.