Marjorie Eaton with chimp eyes looks like “a guy in a cheap mask”, whilst Ian McDiarmid in cheap ROTS makeup looks “remastered”.
I don’t share that opinion, either.
Both have make up effects applied, the original holds up poorly whereas Ians make up looks a lot more organic and believable. In fact while watching the original version i always felt the emperors face was about to melt off at any stage of the movie.
https://images.app.goo.gl/kVczqCH7ggaiEoDM9