It's often like that .... Ranged vs Cav
If there isn't any cav , the other team get shot by so many ranged, you'll rarely see the same ammount of ranged in both team fighting each other... same thing with cav, it's always like 6-7 vs 1 or 2
The problem is that most of them are like friends or same clan so they use the banner balance to be in the same team ... I think of Acre or Cavaliers on NA or NA Fallen... Maybe creating an "Enhanced Banner Balance" could be made by putting priority on banner, then weapon selection .. but it would probably be hard to make, specially for cav as they don't always start as cav when they join ..