What did I missed from Dom I.? -> DIPLOMACY!

[Pocus]

I think there is two issues : diplomacy, and sharing of same space. I dont care a dime about diplomacy in MP, but I would have really appreciated to have an order which would let the troops of my ally move thru one of my province without triggering a combat with the units I have there. This, I miss a lot.

the problem of not having that is that the game is more compartimented by physical positioning of players that most other games. You wont have choice, and you are forced to interact with your neighbors, be it peace or war.