The day off the Rollback was a wash out anyway. I left around 2 and I don't think it stopped raining (anyone there the whole day)? I'm sure if it was real crowded and not pouring out, they could have hustled and got the rain train off and have a 2 train operation going by the afternoon.
The other Day it was closed was the day of the computer glitch with the train alignment, it never ran. However CP did compensate the patrons that day by handing out front of line passes :). Lightning, the computer glitch, and quite possibly the rollback were out of CP's control, just like the weather. So any shutdown or such I feel should not be considered unusual.
At the rate SFMM going, CP will have their next coaster up before X has its first test run ;)