Does you mean that if region x has a sell offer and region y has a buy offer, and those regions are too far apart to see each other, then a random trader passing by could trigger the sale and pocket the price difference? That would be nice.
That is exactly what it means and what the role of the trader would be.
I would request that at least something be kept to allow troop leaders to feed their troops when in famished lands.
That is something I'm currently thinking about. Might be that carts or something else take that role and it becomes more passive than active (i.e. you don't actually have to buy food).
