Sorry to come late to this discussion, but the main disadvantage for this particular map is that the wheat tile has 3 hexes that can be attacked from the ocean and the spot where the scout is has one. If you are playing at a difficulty level where you have some fear of the AI military power (and the game is more fun that way I think) then defensibility is serious factor to consider as well.
It is a tricky map in that there is plenty of river -- but maybe only one good expo location on the river!