Final Fantasy VI is my all time favourite Final Fantasy game. There's something so ... spiritual about it that modern games have really struggled to capture. I wonder if that partly is because voice acting in some ways often takes away from the experience- less often is more. Along with the wonderful story and script, it allows you to fill in a lot of gaps.
If it were remade I just don't think the new one would have the same feeling. In the same way that both 'Secret of Mana' and 'Final Fantasy' remakes again fall short of their originals. As pretty and polished as they are, they have lost the deepness to them - or perhaps they were just not daring enough.
To your point I've always felt the low fidelity/pixel-art of JRPGs in the 16-bit days allowed your imagination to fill the gaps to create a special impression. It allowed your mind's eye to create something special - between the graphics and accompanying artwork - that was lost as the series advanced visually. While FF7 was a special entry in the series, the shift to a more traditional anime style was completely inconsistent with the visual themes & aesthetic I'd built in my mind with all the previous entries, and it just went downhill from there. Even as a pretty die-hard JRPG fan at the time, I couldn't get through FFX.
The answer has been becoming clear to more users in the past few years: shaders. With a bright, high resolution OLED that has black frame insertion plus a good shader you can do a pretty decent approximation of the look and feel of a CRT. The de facto standard is CRT Royale but others have done good work in recent years.