They removed the state interaction. This means hordes have to now build manually cavalry, which puts you in a very economic tense position unless you are Oirat/Manchu. Tribes should get a privilege that could work like monopolies (or the burghers 5-loan one): When you grant it, you get 5 cav at no cost in a province, and you can revoke it after X time or renew it for more cav. Without this, playing as a small horde and fighting bigger enemies in early wars is exponentially more difficult than in 1.29