I don't understand the question fully, sorry - do you mean a "Preserve reflections" checkbox? There are no plans for this as basically by then you aren't overriding anything anyway, and you're as well working with the full materials as you aren't getting the benefits of simplified lighting, nor of any faster rendering while working on the scene. Though maybe you mean something else, let us know :)
EDIT - BTW, preserve glass is only there because of windows, otherwise most scenes would be plunged into darkness and need manually hiding those objects; it's not there due to preserving refraction and reflection being "useful" beyond making sure light can still enter the scene.