They also dumped an absurd amount of money into the CGI cut scenes.
I really hope it doesn't mean future MMOs will never be like it, because it really is great. It's the first MMO since Ultima Online that's really held my interest...
EDIT: I do think their initial payment strategy was possibly the biggest problem, though. If they would have designed it from the ground up with F2P/Microtransactions in mind, it would have been a lot more successful.
can you post the CGI?