well if that's the reason people are complaining is that balance players are just too good? lol then hell play better lol. I haven't played long but from the posts, I just assumed balance had way more players. can't really penalize players for being good lol.
The easiest way to do this IMO is to give a small hp and dmg buff to the faction with the lowest amount of players at any given time. IE say chaos has 50 players balance 75 and order 37 players. give order a 3%HP buff in siege areas and/or a 3% dmg buff in same areas. percent could go up if say outnumbered 2 to 1. This method would still keep it balanced and make it to where the smaller faction could still compete. With the buffs going to whichever faction is lowest keeps this model fair and balanced again IMO.