If the player database increases the need for servers will increase as well. But most servers will be arranged according to region.
AeriaGames usually don't do region servers unless a game is immensely popular, like Grand Fantasia was.
Usually, AeriaGames will launch 1 or 2 servers from day one. All based on how much activity and positive reactions comes out of the Closed Beta stage.
There is no reason to overcrowd a server, even though its never good to spread the players too thin.
Just chillax, and let AeriaGames worry about this. They do have people employed that knows what they're doing after all