If they were constantly cloning new armies every couple of years , what would happen to all the soldiers once they were too old for service? not to mention the logistical problems involved in sustaining such a rapid increase in population, lets hope the Empire has a good retirement plan. I thought the only reason they used the clones in the first place was because the republic didn't have time to form an army the regular way, and whenever the clonewars is mentioned in the OT it always sounds like it was ancient history in a way that implies that Clones were a thing of the past.
And as for the Empire and Emperor being anti-alien species, isn't this something that was established in the EU only? I know in the Dark Empire graphic novel there was some pretty disturbing stuff about human supremacy, but I don't recall any examples of this in the actual movies, and besides under all that white armour, how canyou tell what is under there? and where did uniformed imperial officers come from?