Terrible ideas. Just terrible.
In any event, hiding the dialogs when GIMP loses focus makes a hell of a lot more sense than dialogs that won’t minimize or hide at all. When I want to see the desktop, I want to see it without any stupid unhideable dialogs in the way.
They have made a single window mode available, that's what we're talking about.
I don’t want a single window mode. I want the things I mentioned. Unless I maximize the window, and then perhaps yes a single-window mode would be better than letting the floating palettes overlap the image window.