Im collecting here "need to be modded" :

1.1Troops and armys : Possibility to exchange troops and Supplys with Siege Armys, like totaly changing an Marchall with new troops or just passing Supplys . Maybe even automated supply routes that could be destroyed or delayed
1.2 Ability to Atack an Army that is Atacking an ally

2.Konserve Buildings after Conquering (getting foreign Buildings with this should be possible with maybe decreases

3.Trade :
1 .Possibility to Cancel my Trade or just change the trader wtf why is that not implemented ?
2. Possibility to ask for certain goods even be able to higher the price of well demanded goods.
3. even CANCEL a Trade pakt wtf

To be worked out (Points Im currently still overthinking about conditions)


-More options and more difficulty to "gain" a conquered population then it is right know maybe
-ability to Govern a Conquered Town even if the Population is disobeying, maybe due to upckeep costs, losses of Man and even the neccessarity to garrison troops to keep up order.

-- even more statistics about the population, like you adress your spy to establish a network of informers for loads of money that boosts corruption but gives us Intel about the mood of the population and their cultures (more depth to culture development in Provinces)