I just don't think they care. Mark Hammil has always been very dedicated to the franchise and genuinely loves it, so he has always been sardonic towards it but i think that he doesn't really care enough to publicly diss an old friend like Lucas. Kurtz is pretty distant now and he has spoken out against Lucas more than once, but beyond these examples i really don't think Carrie Fisher or Harrison Ford gives a shit if Hayden Christenson is partying with Ewoks in ROTJ. The real people who must be totally pissed the fuck off is the SFX people like Denis Muren who have had their revolutionary work obliterated, but they have to remain silent because they are still employed by Lucasfilm/ILM and depend on Lucas for their livelihood!