What could've been done/said instead of Anakin's "I hate you!" or Vader's "Noo!"
I though Anakin's Ep.III "I hate you!" was not a profound enough line even given the circumstances. I mean, it was after all already obvious that he did "hate" Obi Wan. Something else sinister or revealing should've been said. Nothing to long, but impactive.
And Vader's "Noo!" could've had him less emotional. Like he'd realize Padme died and he'd pull both hand of the table observe himself in a slow but shocking way and then raising one trembling tight fist while the Force was trembling stuff crazily around him in the same way it did in the film.