Much of this story seems to be inaccurate, or perhaps outright fabricated for clickbait. The Wikipedia article for City View Center tells a much more boring story:

https://en.wikipedia.org/wiki/City_View_Center

Wal-Mart did move out because of structural problems and a methane leak, but most of the other stores moved out as a consequence of Wal-Mart leaving. Two stores remain open, and there are still plans to re-use the rest of the site.

Also, despite the story talking about the buildings "sinking", the photographs included in the article clearly show the opposite is happening, the buildings are rising/floating up out of the ground, and are now higher than they were originally.