You're being very fair to him there. They would almost certainly have gone up, there was no other reason for that wording. I guess we'll see if and when the same situation arises again. I certainly hope prices would have gone down if we had been relegated.
I'm not arguing against your suggested likely outcome, I'm merely correcting you when you said Barber said the prices would go up in the PL. He didn't. He didn't say anything in fact. The club told us, via the renewal package, that prices would be reviewed. As they also did when relegation was a possibility.
I guess "Club have said they will lower prices if we get relegated" doesn't fit the agenda here though, right?