Another cutscene is grievous killing and fighting jedi, that should be put back in if its available, since that would make him more menacing.
Also maybe the anakin/obiwan fight and the yoda/emperor fight shouldnt be intercut, some have said it ruins the tension of the anakin fight
maybe the noooooooooooo bit could be replaced with a vader scream
theres just some random off the top of my head ideas