The New Emperor hologram and vader dialog from the 2004 version is painfully lame it makes the scene "too talky" and ruins the plot of the original version of the film, and ruins the mysteriousness of the emperor. And Clive Revill's voice was superior anyway, just cause 3 years later he got a cheaper option in a theater actor in Mcdiarmid does not excuse ruining a good film, and the emperor in jedi was way better than the hammy bad awful portrayal of the prequels.
The new scene makes it look like Vader is lying to the emperor and already knows about Luke and keeping it from him, laughably bad considering in 1977 darth vader was not even lukes father and not even til the end of empire in 1980, and the truth was not discovered until 1983, vader could just as have easily have been lying.
It is just as bad as adding an actor into the end of return of the jedi who was 2 years old in 1983, Hayden Christensen. He does not belong in a film made and released of that era, neither do the painfully obvious and extremely dated 90's special defects.