Ok, I’ve just thought of something very simple.
Do you think it would be possible to add what seems to me a very useful function to export?
That would be a button to avoid writing of the yafray file when you hit render.
That would be simply allow the most adventurous to be able to edit the yafray file directly into the blender text editor, then launch a rolling menu inside the yafray panel that would let you choose from a xml file to render from.
That way you could also be able to keep different manually edited versions of your work.
What do you think about this idea? Would it be interesting?