Dennis, I've had exams too, I'm right in the middle of them right now, only two to go. And even with me and Joe busy and not around most of the times, we've managed to gather quite a force every time, mainly because the chain of command works as it should work in your faction as well. Perhaps you should assign more active people to key positions, instead of keeping people there for their experience. No offense, but it's pretty true, you need more active high command. Its obvious that you can't attend to all the events, so you'll need to raise more active people to take charge of things when you're unavailable.
Also, regarding the time of event, well I believe it was shifted about 3 times, from 3 GMT and getting at the current 6 GMT. They changed it because the RM requested it, as their american players couldn't attend, and now they wanna change it back ? Fine with me, but I doubt that's the solution, really.