Missing out on the UA ex-Pan Am Pacific Rights was a big boo-boo for AA. I believe in the Book American Eagle and the rise of Bob Crandall, he did admit that they should have been more aggressive. They did admit about the botched 1989 ORD-NRT bid....
As legend goes, and I can't remember the guy's name right now, but it was a senior member of AA's management who went to Pan AM as their President or CEO. This guy had been promised the position of AA President as Crandall moved to CEO and relinquished the President title. He was also the brains behind the whole AAdvantage program. Seems he was a big threat to Crandall.
So Crandall pimps him (big surprise there) and takes over as both President and CEO. Then, this guy goes to Pan Am. Under no circumstances was Crandall going to get those Pan Am routes. I don't think he was even given a chance at them. It was corporate revenge at its best and it worked. Everyone knew it. Once again, Crandall's ego cost AA dearly.
I wish I could remember his name. He was a decent guy. He was on several of my flights and was always open for discussion.