Very interesting.

I love how the colours in these would tie in with your dining rug as well as that beautiful inlaid chest and mirror..

the beams are the whole architectural focus in house of this style. I can understand people wanting to paint when the ceiling is low and flat as the dark timber can feel intrusive. once painted, the home's point of difference will be lost forever. maybe you should get a designer decorator out to your house, who has worked with style before - they will probably have some great suggestions for other ways to capture more light, through light furniture, reflective surfaces, window treatments, different lighting and mirrors. skylights do make a world of difference too🌞

So many options, add some skylights, paint or plaster walls, paint ceiling, add windows to wall. Question is what features do you love and hate. Change what you hate. Your choice, all will have an impact