The spacing of the fireplace and the tv are good.
Q
Paneling around tv to give character
If needed...add more crown molding and recessed pieces.
How to frame in tv if need to replace
Interesting way to create dimension with firplace sticking out further than tv...Lower t and add speakers on the side in the paneling or on the top.
Shelving on the side.... Lower tv and put into stone
Furniture combinations
The spacing of the fireplace and the tv are good.
Q