I would say it would be better to look how many players are registered and organize so many resources that all registered player can log-in. A full world is a full world? Yes that's true. But punish all players which maybe got into the game since Beta or "early access" and now they have to change servers? Would you just change the server? Would all contacts/friends/FC/LS members would change the server too?

I am really patient with SE, because we had a similar problem like this in our company. But server change would be no solution. I would say putting some "blades" into the servers would be.