Deadfire color scheme. I think there's some problem here, because... it doesn't correspond with theory of evolution.
And what exactly do I mean by that?
Human perception of beauty was determined by evolution. Essentially people prefer things that are good and healthy for them - in the specific environment they evolved in. And humans evolved in Africa tens of thousands years ago. Back then it looked more like contemporary Greece. Or California. The colors, green plants, water, sky, some sand and much sunlight. In comparison, Deadfire lighting is definitely darker. The same goes for UI. And sunlight is very important for humans. Lack of sunlight can even cause depression, like it's the case with autumn depression. Thus it's obvious evolution made humans prefer brighter environment. It draws people. It's just more pleasant to look at and be there.
Of course it would be impossible to change all the graphics now but some adjustments to the lighting and overall color scheme are probably still a viable option. Like adjustments in the beginning of the game. It may be a good idea, because the beginning is the part that is the most often shown on Twitch and YT.
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And here's a short talk about evolution of perception of beauty on Ted Talks.