The original MTW had the best trading system, despite being a bit clumsy.
The trading system of M2TW is fine the way it is.
Long term trade should be implemented, with a "Kingdom Advantages" like thing to make it worthwhile to import exotic goods.
Long term trade should be implemented, but without the "Kingdom Advantage" thing
Other opinion (please elaborate your opinion in a post)
Who cares about trade? It's Total WAR, not Total Economics.