Hey Deep - Just wanted to update you on my progress. I took your shader code and mutated it horrifically and made my own thing.
https://www.reddit.com/r/godot/comments/nuf5um/shader_based_planets/
Later in the week I'll be releasing a video and some code.
Honestly the Pixel Planet Generator was a gigantic inspiration. These shaders are going to go into a game I been writing for the last 3 months.