I'd say he's disappointing the fans more by not putting out good quality versions of the original films.

See that's the inherent problem most fans have with Lucas. Yeah they're not crazy about the changes but those complaints with be far less frequent if he just put out a cleaned up pristine version of the OT. George can go nuts all he wants. Hell he can get Rip Taylor to dub Vader for all I care provided the original film is preserved. Its the same reason Blade Runner fans aren't bitching about there being 5 different cuts of the movie, because the initial one hasn't been ignored or suppressed.

The whole notion of younger fans not being able to get into the original films merely due to older effects is flawed to me because a lot of kids by their very nature are able to suspend disbelief and embrace the universes that are presented to them. The visual style alone attracts fans.

In fact the entire concept of doing a visual overall (everything short of an outright remake) is flawed because the films were not shot, edited, or scripted with the intent of having 21st century effects inserted into them. Its why the additions are so jarring, not simply because they are different from what everyone's used to, but because its goes against the flow of the whole production. Its like adding CGI to the robot in Metropolis. You can claim its to add the story of the film and a reflection of Rotwang's brilliance in mechanical design, its still going to stick out because Fritz Lang didn't use the angles and cuts he did so certain effects could be added.