I guess my lack of interest in multiple light sources is down to not noticing or caring about it before. It's never made any difference to me playing the game, lots of other graphical issues annoy me more. I know it's been talked about before but just never bothered me personally.If you can't see why or what the benefit would be, then I'd be wasting my time trying to explain it to you.
So you actually think it's okay to have a planet surface completely black with a freaking SUN in the midday sky? Wow... I don't even like it pitch black when there is a full moon in the sky, let alone a full sun, but at least I can compensate for this somewhat with my mod. AFAIK I won't be able to fix broken suns, however.
But as I said, my personal solution is to just avoid visiting systems with multiple suns spread at great distances throughout the sky. Even if two close binary stars are of the same color, then one light source is fin. It's when you have multiple stars of various colors spread at great distances throughout the sky that the lighting falls apart.
Genuine question though: do you not find avoiding whole systems just so you don't see the lighting more immersion breaking than the light itself?