Banner balance should be replaced by faction balance - just make a faction field in your cRPG page that is linked to your Strategus faction. This way clanmates can fight together without having random people wearing their banner for autobalance purposes. One big flaw in the current banner balance system is that sometimes 2 clans get to fight on one side versus a bunch of random people. It would be fair that clans that have more than 5 members online (just an example) get assigned to different teams.
Also the balance system should somehow consider the class people play (to keep it simple, if you have a horse you are cav, a bow/xbow ranged, otherwise infantry) and keep the numbers even, there are a lot of situations when a team gets most archers or cav and this usually leads to that team getting the x5.
With the current balance system, 80% of the maps either a team doesn't get balanced enough and wins 5-0 or it gets completely destroyed by the autobalance after the first round and loses 1-5. But this is also due to the highly unbalanced singleplayer village maps that roll on EU1 and EU2, where the defending team wins most times.