The waves look nice, but I don't think you need to go into so much detail. Maybe just a simple line?
Now that you have modified the land (which also looks quite a lot better), I think the sea may need to be tamed rather a lot more.
Have you ever played around with the levels on a layer? I don't know what software you are using, so I can't say where they would be located, but they are normally under 'Colour', if you have that as a menu item.
There is so much contrast in that ocean that its kind of drowning the land. If you either reduce the contrast, or use the levels to narrow the gap between darkest and lightest on that sheet so that instead of being between nearly white and nearly black its merely between two fairly similar blues with not very much of a tone difference between them, I think it would be a lot closer to finished than you think.
But this is only my personal opinion