Originally Posted by
Verain
So far we believe that they will be true. If you were to unite, say, Illidan (high pop, 99% horde) with Sargeras (high pop 99% alliance), you'd probably make both factions miserable, but more relevantly, you'd absolutely crush the server capacity.
If you are the minority on a high pop server, expect no mercy from this technology yet. You can't be merged with anyone.
Meanwhile, on Ursin...
Ursin is a horde dominated server, but it is VERY small. It will be united with other servers. We will likely end up more balanced as a connected realm, but we will definitely end up much larger. That second factor is the big deal.