How could they even think of changing the holograms! I think the timed/cut vader breathing/fighting is just brilliant and the action is realistic, that is what sets these films apart. I met Dave prowse in the city toy shop and he was a giant in full vader costume. Obviously he was signing stuff but that was on the back of Jedi. Jedi will always have a strong place in my heart and it’s easily better than anything that has been made since…
If Vader was in full costume at the toy shop, then that wasn’t Dave Prowse. Dave never did any of the costume stuff for the promotional events like that. Kermit Eller is the best known of the ones that did the Vader events at the time. Not sure if he did the jedi tour though