Those lines, with the exception of Raptor are still as long, maybe even longer than around 10 AM. I like Ridemans suggestion. My typical day at the park starts with Walk On's of Power Tower, Corkscrew, Magnum. Gemini, And then Maybe Mean Streak. Although I would miss that, Night riding is much better AND would attract more people to the park.
After 8 on any day, CP probably starts loosing money because food and drink sales are not as high and most importantly, people stop going through the turnstile at the front gate. Does this warrant closing the park at 8 every day?
They probably want to see if closing the park early will continue to draw as many people. If it does, then they save a little dough. Paying all those people those low wages an extra 2 hours would not hurt one of the most profitable parks in the country. They sure made money last year when keeping the park open an extra 2 hours, so why change a good thing.
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Joe E