I wouldn't get too upset yet, seems like they did it because of massive amount of people playing at once so everyone can have a better classic demo experience since it timed based for people to play on it. Over crowding the same mobs in the starting zones, waiting an X amount of time for something so you can kill then next thing you know your out of time, would probably really get frustrating fast.
However it would have been nice if they went a little more in depth of how the servers were going to function. A lack of communication happened, which got a lot of people panicking.