It would be great to be able to turn the visibility of reference planes/lines on and off with a button on the Quick Access Toolbar, just like the "Thinlines" button that toggles the visibility of line weight.
This would let us preview what is actually going to plot a lot easier without having to change our visbility/graphics overrides. Even better would be adding a keyboard shortcut for this feature so we can turn reference planes on and off on the fly when drawing in complex areas and the reference planes are getting in the way from you seeing things clearly.