They are trying to save money because in a few months they will be down to 10% of their current population and will be merging servers anyway.
Yeah, since Age of Conan and WAR both (in the last year or so) ran into this problem. Especially in games where PvP is a notable part, low pop servers are terrible.
Also, keep in mind that if you have 1000 players and 10 servers, you might not end up with 100 people on each server. New servers won't help if too many people choose to play on the overloaded servers.
The server stuff will clean up in a few weeks anyway. The real issue is how well they can keep bots and spammers under control.