There was already some grumbling on their Facebook about it. And people complaining that John Barrowman and the Karate Kid cast were never reannounced, as well. And I read an interview with the guy in charge where he basically admitted the date change had harmed people's trust in a brand new con and they had work to do to reestablish it and be careful going forward.
This is definetly one of the more unique situations I've seen with a con over the years.