Texture work is great. And I was going to comment on the geology, then I saw the explanation, so I guess that's cool too The font you are using is pretty nice, but I have to say it becomes really hard to read with the outline. Works fine without it though, as in the city labels and some others, so I'd say drop the outline on those that have it. And maybe use something else on the text in the cartouche? It's not that suitable for long paragraphs, I think.

I'd also try and see what it looks like with the cartouche as a very tall, thin block to the right of the map, and the compass rose in between the continents instead. I think the cartouche is splitting the map in half right now, sort of…