You guys are kinda missing the point of the pass preview night. Sure it is for all of these people you guys are mentioning, but it is still less then a normal day, and most people are there to ride the new rides. So yea it does stink for the people who only want to ride the new rides, but it isn't as bad as it will be on the 12th.
Also, it is just as much for the employees as it is for the guests. The employees are learning the job first hand and this night gives them a chance to test the job and see just how it works before we open officially. Just remember.... this is a Preview. Don't get upset if it is a little busy because you will have many more chances to see the park. Just don't let the crowds spoil your night!