I would not expect the fix for coastline glitch in the World Update 3 (UK) in February.
In the feedback shapshot the bug has ca. 380 votes and is marked by Asobo as “started” with release date marked “backlog”.
Hard to me to accept why they tolerate such deterioration of the visuals, maybe it’s not appearing in the areas they live/fly like Arcachon basin with low terrain on the shore.