1) Save as png for better quality
This! I was just looking at the latest picture, thinking "man, again with the smudgy JPG:s, he should save it as a PNG" and I was going to post about it but I was 1 post late I see...
If you look closely, there are places where the noise of the JPG format is really noticeable. The title, the shores of all the continents, the edges of the army circles...
As this will be the "flagship" map of CC, this kind of image quality is just not acceptable... I'm sure it will look much better as a PNG.