Putting Hayden's rapist/creepy face in there was IMO, Lucas' worst change for RoTJ. Definitely ruined what was supposed to be a great scene.
And it arguably doesnt even make sense. Since Obi-Wan's spirit is shown as his older self, not his prequel self. Which presumably, is because he died at that age.
(The whole "Jedi Rocks" singing CGI scene comes a close second. Although that stupid singing scene I can skip since its not important. I can't skip that final celebration scene for RoTJ.)
However, I actually don't mind and quite enjoy the music change in the end celebration scene...actually felt it fit better with that scene and sounded more meaningful and fitting as the end to a whole epic saga/journey.
Anyone else agree?