I'm not fond of the grassy land texture. It's clearly grass, and as such is too large for the scale of the map. Plus, the water is flat color rather than textured, which makes something of a mismatch to my eye.
I'm not sure how nice it will look without that texture, but perhaps if you simply had something with much smaller detail? You said you're not going for a photoreal look, though, so I think maybe either flat color or a stipple texture of some kind might be better.