Open-mindedness does not mean waffling on matters until your head explodes, it just means being receptive to all the information around you, filtering out the "noise," and making your best judgement on what you have. This will remain an open-ended process, as any new and previously-unknown information you come across has to be factored in. CLOSED-mindedness came to a decision long ago and ignores everything else that comes down the pipe as "obviously they're wrong, because they're contradictory."
Open-mindedness is ALWAYS better. It doesn't necessitate that one ping-pong, it just means one always looks at infomation--usually looks for MORE information than most will--and not plug one's ears singing "la-la-la-laaa..."
I say change is not always good at all. Often change is bad.
You see, I'm employing a figurative here, not a literal. The results of change can certainly be bad, but the process of change is not only good, but fairly unstoppable. And I certainly don't think we want a society of stagnation instead. Change is the only way to find out what works better, and it's also the way we find out what works worse. And the best thing about change? The ability to change back when we get it wrong.