We have been season pass holders the last 10 years. This year we decided not to get the passes. I have found the last five years the lines have been getting bigger and bigger. If you are at the park on a weekend there will most likely be a 45 min wait at the big rides. It doesn't get better during the weekdays in the summer as well. We used to go on the weekdays after 4 and take about 3 rides and leave.
You may ask there is the fast lane pass. As a season pass holder, if you go to the park 5 times, you will be paying $50 each time for the fast lane. That is an extra $ 250.
It seems to be good for kids who have nothing to do in the summer holidays and it is more like a secure meeting place. Secondly, the parents also feel a little sense of security when the kids are inside the park.