It's alright - Kel'thuzad, C'Thun and Ragnaros were also powerful beings conducting all sorts of villain-things and we "had to" get rid of them. But back then it wasn't just thrown at us as if it was the main purpose of everything, they were just powerful creatures inside huge instances for many people. The main focus was the world and the biggest villain for huge majority of people - were members of the opposite faction. Whether it was in organized WPVP, BGs or just gankers, most of the time you fought the opposite faction.
So to repeat myself, I am glad that there is no dark god threatening the safety of our world and making us be one faction once again where it doesn't matter whether you're Alliance or Horde. I want us to explore the world and do PvE and PvP content like we used to. Sure, they could pull N'Zoth on us or something at the end, but again - we had that type of villain as early as vanilla. Not exactly anything like Legion (Burning Legion) or WoD (Iron Horde).