The Emperor there looks quite intimidating. I love that you can outright see that, regardless of the fact that he is about to execute someone, none of his Sith warriors do nothing more but look on - it almost screams that they have seen first-hand that the Emperor is capable of taking care of his own threats.
I thought that the lightsabers worked really well in terms of the composition, drawing the eyes first to themselves, then to the Sith, then to the rest of the crowd where they could wander freely (I focused on the Twi'lek). What I've seen of your gallery so far is awesome--great lighting and all. There's a lot of tension in this scene. Excellent!
My eye was drawn to the Sith Lord then across to the Mandy with the blue helmet, which really evened out the whole composition. I like how the Mandy's shoulders are slightly out of focus. Adds to the illusion of depth of field.