Think it's looking great. About the color: in my opinion, I like the yellower tinted slightly less saturated color. The deep blues and greens remind me of a save the planet shirt. Just reminds me of earth pics too much to not constantly compare. I'm all for colors that make the world seem a bit more fantastic or unearthly. I tend to buy into another world that way more. I also think the yellowish tint helps unify the landmass and oceans better so the whole map feels slightly more unified and less land vs sea. Just my thoughts!?

But more importantly how are you achieving your topographical layers? The depth and structure look really cool. What's the technique you are using?