You can easily make internal conflict now with the alliance.
I just gone state my bias here before I write my comment, I am a horde boii! I love me orcs, me trolls, me goblin! and obviously my smexy handsome belfie boi!!
I am a horde for life, and nothing would make me ever want to play as nubliance!
That being said, Alliance need their epic moment, to become a worthy enemy. I feel kinda bad killing the alliance, and sure you could say that the have won many things, taken Ogrimmar two times, done this and this, but it is always horde that has had the grand set pieces, we burnt the tree, Garrosh bombed Theramoore, horde took over land and blighted all of south shore. our actions shows, our victories are felt and look cool, the alliance victories are just, hallow or shallow.
One thing I would love to see is the night elves going “Nah nah, frick this whole peace thingie thang! we want blood!” and then they make this army of nature, filled with ancient treeants, their green dragon allies, furbolgs and others as their allied races, and they go into their ancient homelands of Feralas, take over the Zone make the ruins of Dire maul into their new capital and genozide any horde within their forest home.
Just rip the horde forces and settlements there apart with sword, claw, thorn and roots!
Then lets say we get ogre to join us, the few terrified survivals of Diremaul.
The ogres can settle in Dustwallow marsh or something.
Then to go completely nuts we can have the high elves take over Dalaran, land it in the cratre of Thramoore, then Dustwallow marsh can be made into a magical world-PVP zone with magical two headed ogres and high elves flinging spells at eachother!
give us the WAR in warcraft my dudes.
Have a good weekend.
with love.