Alderaan said:
*Vader doesn't calmly say "alert my star destroyer blah blah blah" when he's seething with rage.
That is one of the best changes in SE. The original scene with dumb anger mood completely contradicted the character of Vader as presented throughout the film. He was an intelligent villain, not some angry moron. Nothing seems to be able to upset him and that is what makes him even more cool.
He was being failed most clumsily by his officers and yet he showed no anger when he was executing them. On contrary, he did it with sarcasm, wit and style... making clam remarks like "Apology accepted, Captain Needa" while choking the guy to the death.
And the original scene also contradicted the scenes that follows. On the Star Destroyer, Vader is very clam and his primary emotion seem to be disappointment. There is no sign of any anger. He doesn't even choke Piett and instead he simply just leaves the bridge in silence.