Well, a major problem with the way the map is set up right now are the barriers on Rye and Barley. With the bottlenecks there and the ones surrounding Coal, it sets up a stalemate line with nearly no upkeep and no way of overcoming it.
With only units on Vodka, Krystal, and Gunpowder, any Turkey or Russia can hold a whopping 10 centers completely uncontested, even if they give no orders to those units. The same occurs on the other side of the map, with England or France on Cheese, Glass, or Sulphur. This is a MASSIVE imbalance when it comes to design, and enforces the traditional power inequalities rather than solve them.
This could be easily solved by making England and Turkey neighbors, by allowing one "corner power" to beat up his opposite. The economic map is a totally abstract and should allow any power to effect powers it wouldn't normally have contact with, at least not towards the end of the game.
We already have a severe example of a stalemate in
gameID=717, where Turkey refuses to stab Austria, and is too far away to effectively strike either Italy or England. Likewise, Italy has a serious advantage on the economic map over Turkey but cannot effectively strike at his bloated army.
If the left side of the map was connected with the right side, England's two unit stalemate would be undone which could be enough to break his massive stalemate on the main map. Or maybe Italy could sweep through Turkey's stranglehold on the right side of the map and make a mad dash for the win.