Seems like during the changes, the server max player limits were also reduced. Not sure if this was intentional or not.
Yar, GReaper nearly fainted at the thought of 12 vs 12 Frostbyte!
If there's continued interest in a 12 vs 12 test server, let your voice be heard. Seymour's easier to persuade GReaper on issues like this if there's a demand for a higher player count server.