What have darth sidious done as galactic emperor besides building death star and improving military? I mean, in episode III he talks about an unified language, monetary system etc. and peace. Have he done anything close to this?
Also remember he became more of a figure head. The "puppet" senate and Moff Council are the ones who made most of the choices. The leaders of the Imperial government did this. Palpy went to focus mostly on Sith matters ect, following in the foot steps of his master.