It has been suggested before for beta, I will suggest it again for gamma. It would some times be practical to have the patch on top of the renderer. for adjusting, testing out stuff and live patching.
It would especially be practical if you are patching on a small screen and want as much patch space as possible while also being able to see a render window.
An alternative could be to make the background transparent, then it could just be on top of the renderer.
then having a transparency adjustment would make the patch legible even with a difficult background