I get what you're saying, and I completely agree. I understand the urge to make big announcements to coincide with Joe Con, but if you're not ready, you're just shooting yourself in the foot by forcing this artificial deadline. This day and age of broadband internet and forums, there is no reason to wait for Con, especially a Club that has its own newsletter to disseminate information....
A similar phenomenon is going on with the SK Omega line (although on a smaller scale). People are already predicting Death of Teh Line because of the amount of time lapsed between the initial announcement at the Con and the still-pending product release.
I do think the Club could have been a little more open forthcoming with info, even if it's vague. Dropping hints like "We just saw the painted prototype for our potential 5th figure...a great update to a well-loved Sunbow character", or "We just got approval from Hasbro for our 9th figure...and I guarantee most of you will love her" would make members and potential subscribers feel part of the process, and keep enthusiasm up at a steady simmer until the official unveiling....