Wait merchant republics no longer get estates?
Nope.
These guys cannot get the Church estate: Merchant Republics, Native Councils, Siberian Native Council, Celestial Empire, USA, Nomads, colonial nations
These guys cannot get the Nobility estate: Merchant Republics, Native Councils, Siberian Native Council, Revolutionary Republic, Revolutionary Empire, Celestial Empire, Nomads, colonial nations. And if Common Sense is active, English Monarchy and the 2 constitutional governments.
These guys cannot get the Burghers estate: Merchant Republics, Native Councils, Siberian Native Council, Celestial Empire, Nomads, colonial nations
These guys cannot get the Cossacks estate: Merchant Republics, Native Councils, Siberian Native Council, Celestial Empire, Nomads, colonial nations, anybody that does not have eastern units, anybody that is not christian
These guys cannot get the Nomadic Tribes estate: Merchant Republics, Native Councils, Siberian Native Council, Celestial Empire, Nomads, colonial nations, anybody that is not nomad
These guys cannot get the Dhimmi estate: Merchant Republics, Native Councils, Siberian Native Council, Celestial Empire, Nomads, colonial nations, western tech nations, anybody that is not muslim
What Wiz said didn't come to pass. Likely did not have time to implement it (as that would require reworking how factions are given).