I have ideas to improve it, stay tuned by following me on my socials medias :)

I provided a full documentation when you buy the product, you can also check my YouTube channel for a complete tutorial on how the nodegroup is working.

Yeah it is! Eevee or material preview is nice to have a direct feedback while designing your pattern. But I recommand using cycles for the rendering.The reason lie in the fact that realtime renders in blender let appear artefacts sometimes.

Yes.