Since there isn't really any tutorials for FxGen currently I would suggest adding a comment property to each operator this would allow people who create the textures to give insight into their creative process.
It would also allow users to learn from the project files by clicking on the operator and reading the comments (of course that's assuming we use comments and being a programmer I know that sometimes they are a little sparse).
The reason why I suggest this is because I can see the secret to creating textures is to think in a layered approach and for beginners learning to break the texture up into parts and when to put what part in what order may be confusing.
Great product and project
Very good idea! It could be
Very good idea! It could be useful internally just to note what the heck you've done as well, either to yourself or coworkers. :)