The reason I say the outcome was altered was due to the quote attributed to Bernie, in which he claims to have not played by the rules.

“We had enough information in time to investigate the matter. According to the statutes, we should have cancelled the race in Singapore under these conditions," he said. "That means it would never have happened for the championship standings. And then Felipe Massa would have become world champion and not Lewis Hamilton.”

I agree that nobody knows what might have happened had the spin not been directed, but if there was a statute that stated it should have been cancelled for the purpose of points, it surely wasn't followed.

As for the leading teams changing, people can speculate all they want and have done it for years. But for the most part modern F1 has seen periods of team domination frequently, often with only regs changes upsetting the balance. But people attach whatever they can in speculation and try to find a way to say it's all fixed. I personally don't fall for it myself. Though I'm far from having 100% faith in FOM or the FIA, I think often the fans engineer more problems with the speculation.