Namely: the rivers are a little less straight, there are animals in the rivers, and generally more, the banks use slightly different textures, more grass patches, no fishes (to change?), and there are gazelles in the center and changes to the sun settings (using the scenario's).
I'm using a new type of painter, so I've linked "painter.js".
It's still not perfect, but I think it's a step in the right direction.
Note: this map works much better when it's small. Which makes me think we should allow random maps to be limited to a certain "range" of size: some can perfectly be stretched, it's harder for others (eg Corsica vs Sardinia suffers on "Tiny", while this one gets really ugly when "huge").