Something else I noticed about the graphic issues,
it gets less noticeable with AA turned on in the client, at around an Anisotropic Filtering of 4, it pretty much disappears altogether. But at 2 its still somewhat visible in the distance, and Zero you get quite a bit of it.
You can see it plainly over the water and on the sand. here: https://imgur.com/Yk4rg10
It looks like gaps in the texture tiles let either background or random pixels through, and it just multiplies the further you go out.