I know that an actual change to Beluaterra's map is unlikely since it would be a lot of work on Tom and the Dev team.
But, it would be interesting if when the blight is removed the areas under blight were changed. I imagine areas previously fertile being badlands and parts sunk into the ocean by earthquakes or other forces. The west has the largest area under blight. I could imagine parts of it under water and islands or a new mountain range.