The general textual interface is quite bland, something as simple as larger buttons with pictures and descriptions as roll-over text would be much more evocative.
The whole ship-upgrade economy is quite poor and really serves as a pitfall for anyone with conventional gaming experience.
The brinkmanship of fuel/food required to optimize time at sea is irritating after the first few runs. A topographical in-lay on the map showing you how far you can travel would be delightful.
More should be done to personalize the island stories from captain to captain.
That’s all… for now.