The thing with consoles is that getting updates is not as easy as it is for PC's. Most MMO's at launch have an update, or more then one, within 24hours of launch just to keep the launch moving along as smooth as possible. Seeing as consoles usually have to have all software approved before it can be used this would not work at all and they would need to have a separate Mega Server for consoles and for PC's otherwise there would constantly be version mismatches and console users would be left behind the PC users within days of launch.