My suggestion is to add the ability to procedurally generate a background in CoronaSky instead of the “Ground sea” slot.
This would make it easier to create landscapes with a sea backdrop.
Perhaps presets could also be created not only for the sea, but for other settings as well.
Such as fields, cities, etc.
But the sea is the most versatile and will work for a very large number of scenes with a seascape, which is not the case with other backgrounds that require more context for a specific task.
Not sure this will be possible given how the Sun / Sky works, just as a heads up to avoid disappointment if it does turn out to be impossible / slow / etc.