Fact one: if you don't like people in your MMORPG, don't play mmorpg's
Fact two: merging severs doesn't solve that zones are fully manned. Cross server open world zones do.
Fact three: not a single sever population can man ALL present day content 24/7. Cross server mechanics do.
Fact four: mobs and ores etc spawn with a formula' more people more spawns.
Fact five: since SC2 and DIABLO 3 Blizzard regroups all their players per region on one cluster server, this is just the next implementation.
Fact six: fans don't be fooled' the most "anti" reactions come from the usual Blizzard bashers/haters.
So now that the competition is in the ropes with this new " cross server open world play without loading screens" it is all out attack at the moment.
I smile: this feature just widened the gap between WoW and the wannabees.