Will try and encourage people to join to make sides even, (although stat whores will probably all join whoever has most players :)).
This has been a problem since the server went up. It is impossible to have 'red' vs 'blue' planes since one side generally has 90% of the players on it depending on the time of day. We have 1/2 the missions now designed with all planes on each side, and all missions now have at least migs on the same side as the eagles so please people play sensibly and even out the sides. This extends to checking the type of planes people are flying - if there are 4 hogs on one side and two flankers on the other - join the hogs :).
A small success story related to this - there are some missions where a side with 30% fighters has completely shut down a side with 80% fighters. This is related to SEAD and EWR strikes but also these same missions are generally bomber friendly having the targets nearer to the strike homeplate than to the enemy - the key is to make sure you read the breif and map, I have employed the above tactic very far from home - know where your freindly SAMS are :D (ships are best) You can take out greedy fighters easily like that! (& its fun)