Twister was
not a good attraction.
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Say what you want about Fallon, but I'd say it's an absolute improvement in every way; better ride experience, better queue, better facade, better atmosphere, better guest satisfaction.
Now Disaster? That's definitely a bit more debatable, as I do consider that a good attraction. F&F has a serious chance of being a pretty huge downgrade. But operational expenses for that ride were so obscenely high and the ride system was on its final legs so it pretty much had to go.