Communication is a hard thing to figure out. You don't want to announce anything that isn't already pen to paper, because announcing cancellations sucks. It always hurts when I have to post to Facebook, "X panel has been cancelled due to the host cancelling the event." No one wants to hear what doesn't happen at the convention. Everyone wants to hear what good stuff is happening. In fact, despite the fact that the panels I had to announce cancellations for HolMat2015 were minor panels, people still responded to them more. People see that more. But, as a Panel Coordinator, I had a duty to keep my attendees informed as soon as I knew the information, because its their money, and I wanted them the maximum amount of time to be able to plan their time for the convention, and it was heavily appreciated.
If any Fanime staff is listening, I can tell you that the more you talk to your attendees, the more they appreciate you. I put myself heavily out there from October to December. I had people say some really bad things about cancellations, but, once I got to the convention, I got so many people going, "Thank you for keeping me informed." I never announced anything that didn't have ink to paper, and we timed most of the announcements, but we announced things very consistently, and very quickly. We kept everyone informed. The schedule changed, but people could plan two months before the convention on which panels they were going to go to, which times they were going to schedule their photoshoots, and when they were going to go to an event. We had a solid convention. Things did change, but that's unavoidable.
I wish I could help you all, but its a little late in the game for me to get in and help (if you need help in the first place). :P
If any Fanime staff is listening, I can tell you that the more you talk to your attendees, the more they appreciate you. I put myself heavily out there from October to December. I had people say some really bad things about cancellations, but, once I got to the convention, I got so many people going, "Thank you for keeping me informed." I never announced anything that didn't have ink to paper, and we timed most of the announcements, but we announced things very consistently, and very quickly. We kept everyone informed. The schedule changed, but people could plan two months before the convention on which panels they were going to go to, which times they were going to schedule their photoshoots, and when they were going to go to an event. We had a solid convention. Things did change, but that's unavoidable.
I wish I could help you all, but its a little late in the game for me to get in and help (if you need help in the first place). :P