I always thought Pacifica was very Machiavellian about how they played this game, which was what made them successful for so long. They showed that Bob was ultimately ammoral, and that it's easier to manipulate treaties than become a lasting beacon of camaraderie or justice. However, every system of playing this game has its limits, and I think what you said here is essential:
When that has been expended, it will be very difficult to rise up again...I imagine they would have to play fair consistently until a whole new generation of nations become the dominant players on Bob. With who we are now, we won't forget that image of Pacifica with a corrupted political and moral standing, which means we won't easily ignore the small things that might lead to their full rise once again. If there's one thing this war shows, it's that pure strength in the game isn't as important as the image one consistently cultivates on Bob, because your image, even if not immaculate, if honorable will win you sustainable allies.