I agree an improved and realistic economic and trade model would be a nice addition
Although I think one of the problems to make it more realistic is that even the goods and their production processes - the cornerstones of the economic model - are abstracted. It's quite hard to say precisely how much iron would be produced by a mine in province A, in what degree the mining would be improved by invention B, how much coal there would be needed to make steel, how much steel there would be made in province C and how invention D again improved that particular process.
That said, I certainly hope an equilibrium between realism and game-balancing can be struck.































