Its kinda weird tho. I've heard this server "yesterday". Insta dled client and started playing my ud lock, which i actually had at 70 retail. Quite liked game so far and asked some friends to join up on me, for sake of good old days, right? well, they can't. Cus, they can't even create character "today".
I mean, its good to hear that you are try doing somethings about population imbalances but, communication should be key, not force. You should have said like, "ok, we will lock char creation in horde within week, 2 week, whatever time." Instead locking it and sharing it after that. So players can ready theirself around this information.