When features start getting pushed back and/or delayed (and if you know anything about game development you know it's folly to assume they won't), are people going to start freaking out?
Some people will freak out over anything, but you'd be surprised how understanding most people can be with really frequent, honest updates.
Chris even went on record today to explain that the dogfighting module was facing a delay due to a rewrite of CryEngine's netcode. Rather than using the out-of-the-box implementation that would just need to be torn down later, they're going to do it the right way from the start. I didn't see anyone break out the pitchforks and torches.
Backers just need to see steady progress. I don't think that many of us are under the illusion that everything is going to go smoothly and hit all the deadlines. But to put things into perspective, it's been nearly 15 years since Freespace 2 was released and enthusiasts are still modding the hell out of it since there's been no better alternative. The publishing industry hasn't been kind to this genre and its die-hard fans have been through disappointment after disappointment. This is the first really promising thing to happen to the space combat sim community in a very long time. Personally, I've waited over a decade and I don't mind waiting a little longer.