Well the reasons I’ve stated are backed up by @Okkelinor and @nevir
Other than that, as well as you can suggest stuff. I can say why I don’t want it or why I don’t think it’s good to implement.
In a suggestion thread you can go and say yes or no to an idea, and that’s what devs want to know too, if people want or don’t want certain things.
Anyways, I think having the option to mix stuff for color, defeats the purpose of actual exploring for the color variants in the different planets, if we wanted new tints, I guess devs will be adding servers(planets) or biomes, before applying a mixing solution.