keen tendon
Allow one server transfer within 24 hours of logging in. As there is no pre download for the game, people from guilds will be logging in at all different times. Some may go to a server and then find it is full by the time that other guild members get to download the game. I also feel you have underestimated how many people are looking to play on launch day. This means that guild members will be spread out over several servers with no way to join together for a week. This can be resolved if you allow guild members one sever transfer in the first 24 hours of logging in.
vital light
mighty dove