Kind of strange how there is a chunk close to you that is normal res. Also, you have additional mods running. While that might not be a problem, I am sure your mods aren't 100% compatible with A18 yet.
I use Texture Streaming and I don't see the blur you guys are mentioning.
Radeon RX 580 6GB
I can tell you, if you have a Radeon GPU, Nitrogen is the only way to go currently, unless you like your terrain in slices.