- now a bolder suggestion: emperor's minions could perhaps (if technically possible) changed from humans to neimoidians. There is plenty of neimoidian footage in the PT. This would be really a minor change since emperor's minions play no real role in the OT, but as neimoidian opportunistic nature suggests, they stay close to the ruling party - the emperor.
I doubt the Emperor had a very high opinion of Neimodians based on the prequals, they may be sycophantic and easily manipulated, but I doubt he would trust in them in an advisory capacity, they come across as pretty bumbling and stupid n the prequals. In ROTJ we barely glimpse his advisors but they do appear to be twisted and dark in a similar way to the Emperor, which lends them a greater sense of mystery to the buerocratic Neimodians. I always assumed they were dark Jedi of some sort, although the Prequals rule of 2 blows that theory out of the water.