I found most of the changes were not very important. They don't contribute to the movies in any way. The only ones I have a hard time "digesting"
when I see them is that Han/Jabba dialog (I hate the way Jabba looks), the weesa free thing and that Anakin force ghost in the end. The actor's face has a really weird/psichotic/sexual offender look to it.
It's not a very reallistic LS face IMHO.