Now I know most players are probably going to scoff at this but hear me out.
Tyr was the saviour of humans and lead them to the eastern kingdoms to save them before he disappeared. Outside of that we know very little as to why he did it or what happen in that period.
There are number of things that would be nice to know why we are exploring Tyrs past.
Why did he save the humans?
Why the eastern kingdoms?
Did he teach them about the light?
Did he save them for a particular reason like the dragon flights?
did he also save dwarves/Gnomes?
Was their a connection between him and the humans?
Now I know night elves need to get a satisfying conclusion to their stupidly written arc. However I don't think they should be settling in the Dragon isle as they have an ancestral home in Kalimdor and it feels cheap that they would plant I world tree on the Dragon Isle and not their own lands that need the rejuvenation. Plus the Night elves giving up their ancient home to move some where else feels like them giving up and letting the Horde win.