Here are some ideas that I have and that I hope will be included in US² :
1) Atmosphere-Ocean color changing
Dan said that this feature will be included in the final game, but, take for example Earth's atmosphere, she is blue because she have a specific composition, let's change it to :
Carbon dioxide : 96.0%
Argon : 2.1%
Nitrogen : 1.9%
Oxygen : 0.145%
Carbon monoxide : 0.0557%
Now you have the same, red atmosphere of Mars !
The same thing would apply to oceans.
2) Atmosphere Basic Proprieties
You find the atmosphere of your planet too low/high ? Let's change her scale ! And also, I can't help but it look like the gas giants doesn't have an atmosphere
! (Does someone with the alpha can confirm this ?)
3) Procedural Cloud/Cloud Type
The cloud in US² (no offence) doesn't look very realistic, I have solution to make the cloud a little more realistic but I don't know if it hard to code, imagine we have the Earth (without clouds)
For add the cloud we add a 2nd sphere and on this sphere, there the clouds forming, moving, changing, randomly...