A dangerous path this...
I personally don't think the SW setting lends itself to moral ambiguity very well. Thats not to say it does not happen alot behind the scenes but extremely rarely are their obvious grey zones.
Narratively in SW there is Black and there is White and little to nothing in between. Nearly the entire point of the SW setting is summed up thus, and alot of the utter crap that so heavily populates SW is when people deviate from this precept. It's he simplicity of the setting that is its primary strength.
As amble evidence of point I offer up SWTOR.
If you play the republic storyline it quickly becomes painfully awful because Bioware tries to make the republic morally grey for some reason. (Perhaps to make playing Imperials more palatable) Regardless of the reason the entire "good guy side," arcs are fundamentally undermined and ultimately fail because of the moral ambiguity. A problem the Imperials never have because the Empire is evil, knows it's evil and acts... evil. This makes playing an Imperial much more fun because a) if your evil then everybody is on your page and you can all wallow in your crapulence together or b) if you want to turn good then being the lone light, the underdog fighting against the odds feels equally awesome. On the good guy side then your a) hero standing neck deep in poop and every action you take supports the poop and make more poop or b) a traitorous villain doing awful things to already awful people who were doing awful things to other people so... your pretty much more of the same.
So what I am trying to say is be very very careful how you use moral ambiguity because the setting does not handle it well and it can easily fundamentally undermine the characters and the Universe. Remember shooting Nazis is fun. Shooting at Nazis saving infants from a burning orphanage is not.