I am going to get this item and then I will be more powerful than everything else, I was already bad or this item made me bad. I am already mega powerful and bad, if I am not bad I will be corrupted directly.
There aren't actually any intelligent villains that are weak and manipulate things to cause trouble, all the villains are "me smash, me powerful". Since all the villains are designed like this the ceiling for Warcraft story telling is how big you're willing to make a monster before it's bigger than the planet or can destroy a planet at the snap of its fingers (Dragon Ball Z syndrome or spectacle creep - just like power creep). The journey for the villain to become almighty and powerful is interesting like Arthas' anti-hero story because its not about how powerful he is it's about his loss of morality to become the monster and then his redemption, but the heroes who go to take him down? They're not interesting at all, their journey is to just 'be' stronger, they don't have to out wit anyone, most likely they'll find some form of kryptonite. There are exceptions like the Karazhan chess game but they are few and far between.
In something called 'Warcraft' we have very little to do with the cause and prevention of actual war, it should really be called 'Herocraft'. Instead of allowing Grarrosh to simply go to Outland and raise an army; where is the subterfuge, the chase and then the trap that plausibly allows the villain to get away and set up their plans to cause more problems. To do those things you don't have to be Deathwing, you could be any character big or small with a pepper of intelligence. Our 'fight' is the journey there shouldn't be 'showdowns' with evil lair's there should be last stands.
Player power is out of control because they keep giving us bigger and more brawn powered things to kill, so at which point do we become the 'gods'. We should never have even touched them to begin with, a god is not a god if you can kill it. We know we will kill Garrosh because he is no god, he is not smart. He is not interesting and WoD is just a waste of time to lead up to a new god which was bigger than the last one you killed.