I would love the ability to purge unused fill styles from the fill style properties selector. When importing fills by inserting other maps the fills list can get pretty congested and unwieldy.

I agree with Quenten's request for a gradient effect. I've wanted this for a long while but never thought to ask for it.

I would love to be able to export with a transparent background.

I hope the UI remains CAD oriented. I really dislike most/all art software interfaces. In fact, I hope the software remains a CAD application.

I always love seeing maps from this style and this one is lovely. My only recommendation might be to add some shading to the ocean.