The way I see it is as follows.
The problem does not exist with the default water texture.
No matter which water replacement textures I have tried (and that's a lot) they all turned out with the same effect.
So after all those different textures I settled for Aquarama, and them I reduced my visibility to 60 miles, and the cloud draw distance the same.
I still have some of it, but it disappears more or less because of the poorer visibility length. (which by the way isn't that long away from reality)
Here's an example from FL330 (the red line indicates the different textures):
Just before it is time for a refreshment
Just after
It's a bit more evident when seeing it live, but with the reduced visibility and the table-fog, it is very much to live with.
I hope this could be of some help...
This by the way is taken in spot view and you can see the break in the upper right corner:
I still think it is bearable.