Since the announcement of Star Wars: The Old Republic, there has been a continuing discusion over whether or not the Sith are actually "evil". The original movies seem to point that direction, however the expanded universe has proclaimed them to simply be a different point of view. The real question for those of us following TOR's development is, "Are The Old Republic's Sith evil?"
When it was discovered that TOR would be using both a two faction system (Republic and Sith) as well as a morality system (light, neutral, dark), many in the community began to argue whether or not there would be the ability to switch factions based on your morality. There is certainly precedence that a Jedi who falls to the dark side can be considered a Sith, at least in title, so this seemed like an obvious assumption. Then BioWare told us that there was no reason for that, as there could be "Dark Jedi" or "Light Side Sith".
BioWare stated that everyone in The Old Republic belongs to their respective side because of national affiliation, not moral point of view. The thought being that an Allied soldier in WW2 could be "bad" and still be fighting for a positive cause while an Axis soldier could be "good" and yet continue fighting for a negative cause. What culture a person associates themselves with supersedes their moral stance in these cases. This justification would allow for Dark Jedi and Light Sith, but it didn't answer the question over whether or not the Sith Empire was evil itself.
Many Star Wars fans contend that the Sith Empire isn't innately bad, more that it's based on different ideals.They focus on the Sith believing more in passion and emotion then the cold, distant Jedi. Under this premise, it is easy to see how such human emotions could lead some to fall to the allure of power and be considered "evil", but nothing about this means the empire itself is malevolent.
If you examine these lines of thought, it's easy to see where the confusion comes in. Is BioWare claiming that the Sith Empire is evil by saying that "good" people can belong to "bad" organizations? Or are they stating that the empire, as a whole, is not evil because it consists of both Dark and Light sided individuals? The recent developer blog may have answered this.
"Where is this all leading? Thats up to you. You can serve dutifully and pound away by the letter of your masters law, or you can risk plotting to someday destroy him and grab his power (as Vader reveals in his plea for Luke to join him). You can even have secret designs to redeem yourself, embrace the light and destabilize the Empire from within." - Neil Pollner
This quote seems toimplies that the Sith Empire, as BioWare sees it, is actually evil. The idea being that if a Lightsided person would want to destabilize the government then the Empire must be Dark Sided. If this is true, it wouldn't be too surprising considering how strongly BioWare relates TOR to the core movies as opposed to the EU. While we still don't have a conclusive statement from BioWare regarding this point of view, this could be a crushing blow to those fans looking for a more open view on the Sith Empire.