I found that Star Wars games about the Empire are always the ones with better stories, and better presentation. A great bias. Just compare the X-Wing series with the incredibly good missions of TIE Fighter. And then SWTOR. And now this - there simply is NO GAME AT ALL telling a similar story about the Rebel military or other Rebel or Republic things. In the end, because everybody follows the trail following the premise that "everybody LOVES playing EVIL !" , we know the imperial military FAR MORE better than the one of either REpublic or Rebellion through these games.
I hate this bias. Very much.
It has nothing to do with that premise.
The bias takes its root in the original story. It is a verbose tale about the grand battle between good and the lately (relatively to human history) introduced absolute evil.
Good, by intent, is set to prevail.
It sets an imperative: what to tell once the battle is over. The story framework does not bring a satisfying sense of closure: people desire to hear more.
Yet the story of the afterwards is not a story they desire to hear. And they do not desire to see the story end.
The resolution of the contradiction is to acknowledge the dark side as the ultimate gate to prevent the unwished end to happen. The dark side, by structure, is the major point of interest.
Once absolute evil is gone, the rest is burdensome. People usually speak of escapism when actually they would like reinforcement. They loathe on different things. They want to occupy all the space: fictional stories must reflect and show that, even in exotic places, things are unchanged, they remain the same.
This limits the stories that can be told. By this virtue, people are irritated when they are shown jedi knights committed to justice. They are angered when they see Klingons who want to remain klingon speak klingon.
The bias was there from the start, it is an unsustainable promise. Quite common in nowadays' storytelling. The Punisher is another con story: the hero kills indiscriminately while being pressed to place his killings in a moral light. As soon as it is done, the story is over.
The empire is the focal point because it is what prevented the story from ending.
Right now, writers are struggling trying to introduce shades in evil, it is no longer the dark and the light side etc They try to offset the legacy of the absolute evil angle taken from the start.