Oops, I completely misread the question here, my apologies.

The NO is poorly executed and very difficult to take seriously, and because of this its nearly universally reviled. It seems petty to include it, because Lucas surely must know the degree to which it was disliked in ROTS. It's as if he was forcing it on fans simply because they had rejected it.

But much more importantly, it destroys the drama of a very powerful and important moment. In the wordless version, it seems so much more raw and emotional, he simply lets his choice speak for him. Adding the scream was just like replacing the venomous "Bring my shuttle" line with the lifeless "Alert the star destroyer to prepare for my arrival." line, in that it was destroying the subtly of the scene to needlessly spell out something mundane everyone already knew.