You don't play a class so others can have fun. If that was the case why would corsair be able to have that high wpf and agi and attack as fast as even possible... how can xbows 1hit then, how could a large warhorse take 50% hp of a peasant with no armor... continue please. I get your point, but playing a class's first task is certainly not giving someone else fun.
On native Khergits were by far unfair for anyone else. They dealt the same or even more dmg than archers on foot. In crpg they don't deal. Of course there are some exceptions, but those exist in nearly every case. Imo horse xbows are still far stronger than HAs. Just because they appear in higher numbers now doesnt make them stronger.
Maybe here the auto balance should even start in the first round and not decide teams by banners for certain classes, ie. cav and ranged cav are balanced, not looking at the banners.