It's not that hard to move a guild.
You have to tell your members to move. BioWare wouldn't dream of moving a whole guildful of characters just because a guild master moves. The decision to move has to be up to the players.
You'll probably want to empty out your guild bank before you do this to ensure the items make the transit with you.
Once you have enough characters on the new server (4), you re-form the guild.
Then, if you had a guild bank on your old server, you contact customer service to get it back. (Good luck with that.)
It's not hard. It just requires a bit of planning and communication.
Um, that's exactly what they say in the blog.