Sure, learning about raid mechanics and new dailies is great for some people, but the only thing that matters to me is the story.
Let's get super nerdy with Dave Kosak, Lead Quest designer, and ask him the important questions :P
http://www.youtube.com/watch?v=osB0_0G5N8g
Topics include:
5.4:
Are you still happy with announcing Garrosh's defeat as early as you did?
Metzen mentioned at launch that this expansion was the build up to the war - is this still the case and bigger conflict is coming? Or is this the actual war now?
Alliance fist pump moment - it was promised - what is it?
What is the moment (in your mind) when Garrosh "becomes a bad guy", seems like he just did all the sudden?
What important orcs are left now since most are dead? Will we see any of them return (wink wink)?
Why leave Sylvannas out of the main story line? Is it like Rhonin in Cata? Just couldn't fit him in?
Why are the Klaxxi joining Garrosh?
Random:
Which came first? Old Gods or Titans?
Where is Dalaran? where is it going?
What are the Naaru up to?
And Draenei - they getting some story soon?
Will we ever seen the Dragon Aspects again?
Is there anything below Tirisfal? (This is the final answer on this question guys)
Where are the following people? Will we see them soon?
Gallywix?
Rexxar?
Me'dan?
Magatha Grimtotem?
Bolvar?
Alleria and Turalyon?