The only advice I think I can give for the height is actually to edit the grid. The weight of the lines is kinda high. Seeing as this is in PS I'm not sure whats the equivalent to layer modes but is there a way to manipulate the opacity so that in blends in a little better and not cover up the actual map? I'm assuming you used bump mapping for the hill?
I'm assuming it's the clients request to have the title on the map? Kinda covers a lot of it and I find unnecessary.