Hi there I think you've got a good base terrain going, however I'd think about:
a) maybe making the texts a bit less ... glowy? They stick out a bit too much, I think.
b) tone down the forest highlights a wee bit?
c) think about continental shelfs - the bits of shallow water that continue away from the coast - they're usually much longer (check out some RL maps for reference)
You're onto an interesting concept with the mountains, however. Maybe a bit more playing around with the actual folds and such, but I think it's a good concept.