Just for info, Clive Revill has just made the voice for the original ESB Emperor. A woman made the appearance of the original ESB Emperor. It's not really visible, due to the prostatics and the holographic effect, but doing all that again for ROTJ would have been quite difficult...

Personaly, I've never liked the original emperor, and at the time of SE, I was disappointed that this scene has not been modified. So, I must say that I like the 2004 edition of the emperor, even if I don't really like the changes in the dialogues of this scene...