I never take on a home improvement project that makes things better but ultimately lands me in the same place as when I started. Removing the border only to end up with a wall that looks normal would fit into that camp.

So, options I would look at would be decorative elements that improve the look of the room and cover up the border mess at the same time. Crown moulding is the first thing that comes to mind. An eight inch (or more) profile can be built up using multiple trim elements assuming the ceiling height is enough to pull it off visually. One task I would like to do in my master bedroom is to mimic a raised ceiling by building a “box” around the ceiling perimeter. The portion of the existing ceiling not boxed in then becomes the “raised ceiling”. The box can be filled with recessed lighting and speakers or whatever else I want so I improve the look and function of the room at the same time. The same issue as with the moulding exists though — you need at least nine foot ceilings to pull it off visually.

Good luck with whatever you decide.