ldf, frankly, don't expect 'balance' in Pacific time zones.
The Euro and US prime-time have a large number of people on, and numbers difference up to about 30~40 people, does not effect the game in terms of balance very much.
However, in Pacific time zones, it's always 90 Bish, 40 Knits and 50 Rooks. There are several reasons, and the largest one is that all the pilots of certain countries have hoarded to the Bishops, so it's not really a problem concerned with squads.
I kinda gave up on numbers balance issues, because those rare times when I get to play in Euro-US prime time, I am pretty satisfied... and in Pacific prime time, I know nobody is gonna change to Knits or Rooks.