Now that I'm thinking about it, the lack of a GM release is somewhat concerning... do you guys think that may pinpoint to the possibility of Mojave being postponed?
I'm not sure why you are worried. Even if it's delayed that just means it will be a better release when it DOES arrive. If you're on the latest beta right now, and it works well for you, just keep using it and don't worry about the release version.
It'll get here, when it gets here...