Read it one more time...
Balance but not equalize...
That's my opinion and do not write, that then we have 2 OP factions and no others playable. Then we will have 4 or 5 playable factions.
If we make sooo many changes - we will have 5 playable factions with same skilled infantry, range and cavalry. That's not the point.
2 OP factions? I can see clans are rotating in 3 factions (Cos, RP, Swe) and sometimes including even Moscow! And winning!
That's good score.
Of course, I repeat - some changes are needed, but not too many. Imo Crim Archer with best bow and arrows should need 3 hits to kill (not 2 or 1) with his skill.
Swedish cav - less skill in shooting from horse.
Cossacks - maybe little bit lower skill in shooting and keep infantry (quick, but not well armored)
Poland - some changes in horseman (lances etc)
Moscow - better cav and little bit marksman.
It's my opinion. I was asked for one, so I make with my arguments.