it was well documented, both in the news and in several pixar biographies. It wasn't an opinion. Disney owns all of the Pixar films. If Lassetter and Bird ever leave Disney the Disney-Pixar films stay. That's a no brainer. Disney pushed for a Toy Story trilogy, not Pixar (this was announced after Pixar's contract was up years ago and Pixar was on the fence about renewing).
Lassetter is now in charge of the Parks and animation studios... Disney gave up a LOT to keep Pixar on... and Disney's benefitted from it. Eisner is out, Lassetter is in, and this Disney fan couldn't be happier.
Disney's (and by DISNEY I don't mean their partner studios - like Pixar and Bruckheimer) sequels are shot out with very little $$ or quality put in. We see this a lot with the princess series of films. Storylines don't jive, voice are off, and animation is quickly put together. This is not just my opinion, this was Lassetter's fear, which he expressed in "The Pixar Story" which was featured on AMC not too long ago (and plays regularly on Starz and other movie channels).
Considering Eisner's other practices in the 90s, it's not surprising Pixar was between a rock and a hard place.
another great thing about the Pixar Story was the fact that Pixar originally started out as a branch of LUCASFILM (ie Star Wars!) but George didn't see the benefit of putting his money into computer animation, and went more into the computer graphics/special effects (which I do have a strong opinion about. the man is obsessed with it now, and it ruined the Star Wars prequils. Where was the story???? somewhere mixed deep down and hidden in the CGI!)... and he let the Pixar crew go. Then Disney picked it up. GREAT choice on Disney Co. part... their movies had been struggling. So so animation (relying too much on computer, and not quality of story), so so storyline... disappointing.
http://en.wikipedia.org/wiki/Pixar#cite_note
I can be a fan of Disney and still not like everything they've ever done. I love the classics (and by that I don't mean the feature length films that come out every year, or just about every year, I mean the ones that Walt himself had a hand in), and I love the history behind the company... don't like Eisner lol he was all about the $$ and could care less about the quality. Something Walt prided in his company. It was always about the story.