Eh, the Star Wars documentary raises a few criticisms, but they are few. Ford's are said so light-heartedly that they don't carry any weight. It just really feels kind of like, "Haha, I can't believe we fought over this back in the day!"
Whereas there is some real venom on that Aliens documentary. Cameron really alienated most of the crew, and keep in mind he really wasn't that established back then. This is not James "King of the World" Titanic. He's pushing around foriegn crew members in another country, disrespecting their union rules and etiquette, and micro managing to an extreme degree. I think that gave me a new respect for Cameron, though. He is so knowledgable about almost every aspect of film that nobody could bullshit him, and a lot of crew members resented that.
In terms of the X3 production, I think at the end of the day, Brett Ratner and Tim Rothman are laughing all the way to the bank.
Singer's Superman Returns was a certifiable dud. It wasn't a disaster, commercially or critically, but was well under Warner Bros. real projections for what they thought was a franchise not in bad of shape as Batman.
So Rothman rushes an X-Men production to release before Singer's self masturbatory spandex drama, with the director who was fired from Superman (the very production Singer left X-Men to direct), and X-Men made more money at the box office.
Ratner had his name attached to a huge commercial success, Rothman gave Singer the raspberry and Singer has gotten nothing but a beatin' since Superman Returns was unleashed onto an unsuspecting populace.