Thelby: I'd probably(if I needed to) create a second atmo node, plug it in between the first one and the planet and then disable the new one's bluesky/redsky density/decay(setting one of them to zero will disable the other, aswell). Then I'd just use the haze parameters to fill the original atmo with the desired colour.
In your height control tab, set the 'haze exp height' to a suitable height(my pyramids image second atmo has an exp height of about 2m, I think).
You shouldn't really need a second atmosphere to make an empty blue sky, though. I do see why you'd consider it, the linked parameters in the atmo node bother me aswell, I'd like to set the 'tweaks' colours independently, too.
The moon in my bedtime for birds image has another 2 haze-only atmospheres on it, making the glow, a pinkish one, and a fainter bluish one, too. Insane values for haze exp height make it spread across the sky. This just makes it
appear to be lighting up the default atmosphere. I'd recommend setting the exp height to '100,000m' then adding an extra zero incrementally until you see it spread across the sky, it'll probably become far too big by '1000,000m' so then I'd adjust the '1000,000' to '500,000' etc. until I have it at the level I want.
Just play around!
