So here are the functions of each class:
General: commands army (will be in game too)
Captain: commands navy (will be in game too)
Exarch: clergy, has a say in diplomat sending and religious issues
Merchant: sends traders/budget
Nobleman: prefect of province, can change infrastructure
All players are in senate, the senate decides everything, how much money will be given to armies/navies, peace or war, money for traders, and so on.
The leader of each group (chosen by other group members) sists in the privvy council of the Emperor, they have huge influence on him.
So, this kindof about all of it. As you might have seen there is new class, so you can (if you want) still change your player class.
I also hope not all players will choose the same as it will be boring to have 20 generals all fighting to become THE advisor while there is 1 merchant without any competition. So I now add something: the maximum players for 1 class will be 10 for now. When all places are full (don't think this will happen) more will be allowed per class. The first ones to post their requeqt here will take the place. OK???