Well the main reason is Money. Some player can feal that they was not lucky enaugh in a first playing try and would wish to start over again, but starting in old server is useless, so new servers is way to get lots of cash from the same players - thats pretty smart move actually.

Bigger servers capacity means, that new players will have no chance to withstand older players of the same server - they will not be able to get anything like Cerber best 10 or caribean pirates ride, or join strong guild cus they recruiting only strong people and they will be continuasly attacked by stronger players in a wild non-stop, cus currently there is many hunters and no victims at all. But instead of getting new servers - we need to have additional late game content - like dungeon, farm, city buildings and other stuff which was already been developed in previous beta version.

You see - in server 8 Light realm, there is about 35 active players at cerber left, with every new day less and less staying in. After new servers been opened - we lost even more players from ours. Players are spreading out to new opportunities and in the end - we are getting weaker.

Its more like last breath before closing game in a month or so - to absorb last big cash fish and make a GameOver. The game is pretty imbalanced right now - old players getting more rich, while new players become even more poor and "hobo" xD