Yeah, politics is just awesome.
....I would say that the characters and their decisions, not the politics of the setting, are what really drives the story. No one following that story gives a damn about who's going to be the next king, but everyone wants to see Joffrey die a slow, agonizing death. And I'm particularly interested in Jon Snow's story, and what he's going to decide to do next. It's people, their struggles, and their choices that make a story matter. Not what happens in a ruling office.
So far they haven't really bothered much with Amon. So far it's all been about what Raynor and Kerrigan want, and what they'd do to achieve said wants.
Bad people show up to claim other peoples' lives as resources? Yeah, it's been done before. I remember once there was a story about this group of people from an empire that sailed south to these tribal lands where they found a whole bunch of dark-skinned natives. They took whole tribes prisoner, thinking to use those people for whatever ends they had want of at the time. Oh wait, that actually happened. Well, there was another group of people who sailed west to another continent and tried to slaughter a bunch of people there and take their homes away so they could have room. Oh, dammit, that actually happened too. Okay, I have one that I know is actually fictional. There was this god, known as the Blind God, who was always hungry, and would eat entire worlds given enough time.
Well, one day, these people who run a reality tv show discover this world where magic is real. They decide to host high fantasy-style adventures there by sending trained "actors" there, warriors capable of fighting and using magic, and they go on real adventures that are recorded for the good folks back on Earth. Eventually these people pretty much start stripping the fantasy world dry of its characters, locations, and stories to entertain a bunch of rich heartless bastards back home. Supposedly, they were compelled to do this by the Blind God, the ultimate incarnation of hunger and desire. Wait a sec....whoa.
Why did blizzard take this route? Is anyone else disappointed? Any chance we will see a return to the space opera character driven politics of the first games? This whole "different races band together against a common enemy" thing is just too predictable and feels like I am playing Reign of Chaos in space.
If you care about politics so much, go run for mayor. The defining trait of space opera isn't politics anyway. it's the individuals in the midst of society. The climactic high-point of the Rebel Yell campaign is when you finally turn against Mengsk because you can't abide that monster's existence any longer. That didn't have !@#$ to do with politics, and it was what everything all the previous events had led up to. The final cut-scene in Rebel Yell was to illustrate the point that you didn't just reject a person, but a totalitarian regime, the dictatorial ideal. Each campaign had a grand conceit, and just like in Starcraft II, the conceit in the Terran campaign was freedom.